Pediatrix Medical Group, Inc. - Annual Report: 2012 (Form 10-K)

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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, D.C. 20549

Form 10-K

For the fiscal year ended December 31, 2012

For the transition period from                     to                    

Commission file number 001-12111

MEDNAX, INC.

(Exact name of registrant as specified in its charter)

Registrant’s telephone number, including area code (954) 384-0175

Securities registered pursuant to Section 12(b) of the Act:

Securities registered pursuant to Section 12(g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act.    Yes  x    No  ¨

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or Section 15 (d) of the Exchange Act.    Yes  ¨    No  x

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports), and (2) has been subject to such filing requirements for the past 90 days.    Yes  x    No  ¨

Indicate by check mark whether the registrant has submitted electronically and posted on its Corporate Website, if any, every Interactive Data File required to be submitted and posted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit and post such files).    Yes  x    No  ¨

Indicate by check mark if disclosure of delinquent filers pursuant to Item 405 of Regulation S-K (§229.405 of this chapter) is not contained herein, and will not be contained, to the best of registrant’s knowledge, in definitive proxy or information statements incorporated by reference in Part III of this Form 10-K or any amendment to this Form 10-K.  x

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer or a smaller reporting company. See the definitions of “large accelerated filer,” “accelerated filer” and “smaller reporting company” in Rule 12b-2 of the Exchange Act.

Indicate by check mark whether the registrant is a shell company (as defined by Rule 12b-2 of the Exchange Act).    Yes  ¨    No  x

The aggregate market value of shares of Common Stock of the registrant held by non-affiliates of the registrant on June 30, 2012, the last business day of the registrant’s most recently completed second fiscal quarter, was approximately $3,338,146,800 based on a $68.54 closing price per share as reported on the New York Stock Exchange composite transactions list on such date.

The number of shares of Common Stock of the registrant outstanding on February 7, 2013 was 50,078,638.

DOCUMENTS INCORPORATED BY REFERENCE:

The registrant’s definitive proxy statement to be filed with the Securities and Exchange Commission pursuant to Regulation 14A, with respect to the 2013 Annual Meeting of Shareholders is incorporated by reference in Part III of this Form 10-K to the extent stated herein. Except with respect to information specifically incorporated by reference in the Form 10-K, each document incorporated by reference herein is deemed not to be filed as part hereof.

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MEDNAX, INC.

ANNUAL REPORT ON FORM 10-K For the Year Ended December  31, 2012

INDEX

FORWARD-LOOKING STATEMENTS

Certain information included or incorporated by reference in this Form 10-K may be deemed to be “forward-looking statements” which may include, but are not limited to, statements relating to our objectives, plans and strategies, and all statements (other than statements of historical facts) that address activities, events or developments that we intend, expect, project, believe or anticipate will or may occur in the future. These statements are often characterized by terminology such as “believe,” “hope,” “may,” “anticipate,” “should,” “intend,” “plan,” “will,” “expect,” “estimate,” “project,” “positioned,” “strategy” and similar expressions, and are based on assumptions and assessments made by our management in light of their experience and their perception of historical trends, current conditions, expected future developments and other factors they believe to be appropriate. Any forward-looking statements in this Form 10-K are made as of the date hereof, and we undertake no duty to update or revise any such statements, whether as a result of new information, future events or otherwise. Forward-looking statements are not guarantees of future performance and are subject to risks and uncertainties. Important factors that could cause actual results, developments and business decisions to differ materially from forward-looking statements are described in this Form 10-K, including the risks set forth under “Risk Factors” in Item 1A.

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As used in this Form 10-K, unless the context otherwise requires, the terms “MEDNAX,” the “Company,” “we,” “us” and “our” refer to the parent company, MEDNAX, Inc., a Florida corporation, and the consolidated subsidiaries through which its businesses are actually conducted (collectively, “MDX”), together with MDX’s affiliated professional associations, corporations and partnerships (“affiliated professional contractors”). Certain subsidiaries of MDX have contracts with our affiliated professional contractors, which are separate legal entities that provide physician services in certain states and Puerto Rico.

PART I

OVERVIEW

MEDNAX is a leading provider of physician services including newborn, maternal-fetal, pediatric subspecialties, and anesthesia care. At December 31, 2012, our national network comprised over 2,100 affiliated physicians, including approximately 1,000 physicians who provide neonatal clinical care, in 34 states and Puerto Rico, primarily within hospital-based neonatal intensive care units (“NICUs”), to babies born prematurely or with medical complications. We have over 200 affiliated physicians who provide maternal-fetal care to expectant mothers experiencing complicated pregnancies and obstetrical hospitalist services in many areas where our affiliated neonatal physicians practice. Our network includes other pediatric subspecialists, including approximately 120 physicians providing pediatric cardiology care, 100 physicians providing pediatric intensive care, 60 physicians providing hospital-based pediatric care and 15 physicians providing pediatric surgical care. In addition, we have over 625 physicians who provide anesthesia care to patients in connection with surgical and other procedures as well as pain management.

MEDNAX, Inc. was incorporated in Florida in 2007 and is the successor to Pediatrix Medical Group, Inc., which was incorporated in Florida in 1979. Our principal executive offices are located at 1301 Concord Terrace, Sunrise, Florida 33323, and our telephone number is (954) 384-0175.

Our Physician Specialties

The following discussion describes our physician specialties and the care that we provide:

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As part of our ongoing commitment to improving patient care through evidence-based medicine, we also conduct clinical research, monitor clinical outcomes and implement clinical quality initiatives with a view to improving patient outcomes, shortening the length of hospital stays and reducing long-term health system costs. We believe that referring and collaborating physicians, hospitals, third-party payors and patients all benefit from our clinical research, education and quality initiatives.

Demand for Our Services

Neonatal Medicine. Of the approximately four million births in the United States annually, we estimate that approximately 13% require NICU admissions. Numerous institutions conduct research to identify potential causes of premature birth and medical complications that often require NICU admissions. Some common contributing factors include the presence of hypertension or diabetes in the mother, lack of prenatal care, complications during pregnancy, drug and alcohol abuse and smoking or poor nutritional habits during pregnancy. Babies admitted to NICUs typically have an illness or condition that requires the care of a neonatologist. Babies who are born prematurely or have a low birth weight often require neonatal intensive care services because of increased risk for medical complications. We believe obstetricians generally prefer to perform deliveries at hospitals that provide a full complement of labor and delivery services, including a NICU

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staffed by board-certified or eligible-to-apply-for-certification neonatologists. Because obstetrics is a significant source of hospital admissions, hospital administrators have responded to these demands by establishing NICUs and contracting with independent neonatology group practices, such as our affiliated professional contractors, to staff and manage these units. As a result, NICUs within the United States tend to be concentrated in hospitals with higher volumes of births. There are approximately 5,000 board-certified neonatologists in the United States.

Maternal-Fetal Medicine. Expectant mothers with pregnancy complications often seek or are referred by their obstetricians to maternal-fetal medicine subspecialists. These subspecialists provide inpatient and outpatient care to women with conditions such as diabetes, heart disease, hypertension, multiple gestation, recurrent miscarriage, family history of genetic diseases, suspected fetal birth defects, and other complications during their pregnancies. We believe that improved maternal-fetal care has a positive impact on neonatal outcomes. Data on neonatal outcomes demonstrates that, in general, the likelihood of mortality or an adverse condition or outcome (referred to as “morbidity”) is reduced the longer a baby remains in the womb. There are approximately 1,900 board-certified maternal-fetal medicine subspecialists in the United States.

Pediatric Cardiology Medicine. Pediatric cardiologists provide inpatient and outpatient cardiology care of the fetus, infant, child, and adolescent with congenital heart defects and acquired heart disease, as well as of adults with congenital heart defects. We estimate that approximately one in every 120 babies is born with some form of heart defect. With advancements in care, there are approximately one million adults in the United States today living with congenital heart disease. There are approximately 2,100 board-certified pediatric cardiologists in the United States.

Other Pediatric Subspecialty Medicine. Other areas of pediatric subspecialty medicine are closely associated with maternal-fetal-newborn medical care. For example, pediatric intensivists are subspecialists who care for critically ill or injured children and adolescents in pediatric intensive care units (“PICUs”). There are approximately 1,600 board-certified pediatric intensivists in the United States. As another example, pediatric hospitalists are pediatricians who provide care in many hospital areas, including labor and delivery and the newborn nursery. In addition, pediatric surgeons provide specialized care for patients ranging from newborns to adolescents, for all problems or conditions affecting children that require surgical intervention, and often have particular expertise in the areas of neonatal, prenatal, trauma, and pediatric oncology. There are approximately 800 board-certified pediatric surgeons in the United States.

Anesthesia Medicine. An estimated 46 million inpatient procedures and 35 million ambulatory procedures are performed annually in the United States. Anesthesiologists generally provide or participate in the administration of anesthetics in these procedures. According to the U.S. Census Bureau, the U.S. population continues to expand and the fastest-growing segment of the population consists of individuals over the age of 65. The growth in population and, in particular the age 65 or greater segment, has resulted in an increase in demand for surgical services and a correlating increase in demand for anesthesia services. The growth of ambulatory surgical centers and expansion of office-based procedures has also contributed to the demand for anesthesia services. There are approximately 47,000 anesthesiologists in the United States.

Pain Management. According to the American Academy of Pain Medicine, more than 76 million people suffer from pain and 15% of those who suffer from pain will consult with a pain specialist. As the population ages, we believe the number of people suffering from acute or chronic pain will continue to increase. Lifestyle also plays an important part in the demand for pain management services. We believe that the combination of the growing population of people who suffer from pain, the lifestyle expectations of this population and the ability for patients to seek out a pain specialist without having to be referred by a physician will increase the demand for pain management services.

Hospital-Based Care. Hospitals generally must provide cost-effective, quality care in order to enhance their reputations within their communities and desirability to patients, referring and collaborating physicians and third-party payors. In an effort to improve outcomes and manage costs, hospitals typically employ or contract with

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physician specialists to provide specialized care in many hospital-based units or settings. Hospitals traditionally staff these units or settings through affiliations with local physician groups or independent practitioners. However, management of these units and settings presents significant operational challenges, including variable admissions rates, increased operating costs, complex reimbursement systems and other administrative burdens. As a result, some hospitals choose to contract with physician organizations that have the clinical quality initiatives, information and reimbursement systems and management expertise required to effectively and efficiently operate these units and settings in the current healthcare environment. Demand for hospital-based physician services, including neonatology and anesthesiology, is determined by a national market in which qualified physicians with advanced training compete for hospital contracts.

Practice Administration. Administrative demands and cost containment pressures from a number of sources, principally commercial and government payors, make it increasingly difficult for physicians to effectively manage patient care, remain current on the latest procedures and efficiently administer non-clinical activities. As a result, we believe that physicians remain receptive to being affiliated with larger organizations that reduce administrative burdens, achieve economies of scale and provide value-added clinical research, education and quality initiatives. By relieving many of the burdens associated with the management of a subspecialty group practice, we believe that our practice administration services permit our affiliated physicians to focus on providing quality patient care and thereby contribute to improving patient outcomes, ensuring appropriate length of hospital stays and reducing long-term health system costs. In addition, our national network of affiliated physician practices, modeled around a traditional group practice structure, is managed by a non-clinical professional management team with proven abilities to achieve significant operating efficiencies in providing administrative support systems, interacting with physicians, hospitals and third-party payors, managing information systems and technologies, and complying with laws and regulations.

Our Business Strategy

Our business objective is to enhance our position as a leading provider of physician services. The key elements of our strategy to achieve this objective are:

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OUR PHYSICIAN SERVICES

Neonatal Care

We provide neonatal care to babies born prematurely or with complications within specific hospital units, primarily NICUs, through our network of over 1,000 affiliated neonatal physicians and other related clinical professionals who staff and manage clinical activities at more than 330 NICUs in 34 states and Puerto Rico. We partner with our hospital clients in an effort to enhance the quality of care delivered to premature and sick babies. Some of the nation’s largest and most prestigious hospitals, both not-for-profit and for-profit institutions, retain us to staff and manage their NICUs. Our affiliated neonatologists generally provide 24-hours-a-day, seven-days-a-week coverage in NICUs, support the local referring physician community and are available for consultation in other hospital departments. Our hospital partners benefit from our experience in managing complex intensive care units. Our neonatal physicians interact with colleagues across the country through an internal communications system to draw upon their collective expertise in managing challenging patient-care issues. Our neonatal physicians also work collaboratively with maternal-fetal medicine subspecialists to coordinate care of mothers experiencing complicated pregnancies and their fetuses. We also employ or contract with neonatal nurse practitioners, who work with our affiliated physicians in providing medical care.

Maternal-Fetal Care

We provide outpatient and inpatient maternal-fetal care to expectant mothers with complicated pregnancies and their fetuses through our network of over 200 affiliated physicians and other related clinical professionals who provide maternal-fetal medical care. Our affiliated neonatologists practice with maternal-fetal medicine subspecialists to provide coordinated care for expectant mothers with complicated pregnancies whose babies are often admitted to the NICU upon delivery. We believe continuity of treatment from mother and developing fetus during the pregnancy to the newborn upon delivery has improved the clinical outcomes of our patients.

Pediatric Cardiology Care

Our pediatric cardiology practice consists of approximately 120 affiliated physicians and other related clinical professionals who provide specialized cardiac care to the fetus, neonatal and pediatric patients with

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congenital and acquired heart disorders, as well as adults with congenital heart defects, through scheduled office visits, hospital rounds and immediate consultation in emergency situations. Our affiliated cardiologists work collaboratively with neonatologists and maternal-fetal medicine subspecialists to provide a coordinated continuum of care.

Other Pediatric Subspecialty Care

Our network includes other pediatric subspecialists such as pediatric intensivists, pediatric hospitalists and pediatric surgeons. In addition, our affiliated physicians seek to provide support services in other areas of hospitals, particularly in the labor and delivery area, nursery and pediatric department, where immediate accessibility to specialized care may be critical. Our experience and expertise in maternal-fetal-neonatal medicine has led to our involvement in these other areas.

Anesthesia Care

We provide anesthesia care at hospitals, ambulatory surgery centers, and office-based practices with our over 625 affiliated anesthesiologists. Following the “care team” model, our physicians work with both practice and hospital employed anesthetists. As an integral part of the surgical team, our anesthesiologists support the surgeons by providing medical care before, during and after surgery so that surgeons may concentrate on the applicable surgery. Our anesthesiologists provide this care by evaluating the patient and consulting with the surgical team before surgery, providing pain control and support of life functions during surgery, supervising care after surgery and discharging the patient from the recovery unit. They also support other departments within the hospital such as labor and delivery, sedation for imaging, and the hospital’s emergency room by providing

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services as appropriate to patients requiring immediate care. In addition, our physicians provide anesthesia care at ambulatory surgical centers and office-based practices for procedures that require some level of anesthesia.

Pain Management

Our physicians and physician assistants provide pain management services in outpatient centers. Our physicians are board-certified in anesthesiology or neurology and board-certified, or eligible-to-apply-for-certification, in pain medicine. This advanced training and education expands treatment options available for both acute and chronic pain sufferers. The physicians develop treatment plans specific to the patients’ individual needs that include interventional techniques such as trigger point and facet injections, pain pumps, nerve stimulators, radiofrequency ablation and catheters as well as medication management.

CLINICAL RESEARCH, EDUCATION AND QUALITY

As part of our patient focus and ongoing commitment to improving patient care through evidenced-based medicine, we engage in clinical research, continuous quality improvement, and education initiatives. We discover, understand, and teach healthcare practices that enhance the abilities of clinicians to deliver quality care, thereby contributing to better patient outcomes and reduced long-term health system costs. Our investment in these initiatives benefits our patients, clinicians, referring and collaborating physicians, hospital partners and third-party payors. We believe that these initiatives help us, among other things, to enhance the value of our services, attract new and retain existing clinicians, improve clinical operations and enhance practice communication.

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We believe that these initiatives have been enhanced by our integrated national presence together with our clinical and management information systems, which are an integral component of our clinical research and education activities. See “Our Information Systems.”

OUR PRACTICE ADMINISTRATION

We provide multiple administrative services to support the practice of medicine by our affiliated physicians and improve operating efficiencies of our affiliated practice groups.

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OUR INFORMATION SYSTEMS

We maintain several information systems to support our day-to-day operations and ongoing clinical research and business analysis. Since inception, our clinical information systems have accumulated clinical information from more than 16 million daily progress records relating to over 800,000 discharged patients.

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Our management information systems are also an integral element of the billing and reimbursement process. We maintain systems that provide for electronic data interchange with payors that accept electronic submission, including electronic claims submission, insurance benefits verification and claims processing and remittance advice, which enable us to track numerous and diverse third-party payor relationships and payment methods. Our information systems provide scalability and flexibility as payor groups upgrade their payment and reimbursement systems. We continually seek improvements to our systems to expedite the overall process, streamlining information gathering from our clinical systems through to improving efficiencies in the reimbursement process.

We maintain additional information systems designed to improve operating efficiencies of our affiliated practice groups, reduce physicians’ paperwork requirements and facilitate interaction among our affiliated physicians and their colleagues regarding patient care issues. Following the acquisition of a physician practice group, we implement systematic procedures to improve the acquired group’s operating and financial performance. One of our first steps is to convert a newly acquired group to our broad-based management information system. We also maintain a database management system to assist our business development and recruiting departments to identify potential practice group acquisitions and physician candidates.

RELATIONSHIPS WITH OUR PARTNERS

Our business model, which has been influenced by the direct contact and daily interaction that our affiliated physicians have with their patients, emphasizes a patient-focused clinical approach that addresses the needs of

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our various “partners,” including hospitals, third-party payors, referring and collaborating physicians, affiliated physicians and, most importantly, our patients. Our relationships with all our partners are important to our continued success.

Hospitals

Our relationships with our hospital partners are critical to our operations. We have been retained by over 350 hospitals to staff and manage clinical activities within specific hospital-based units. Our affiliated physicians are important components of obstetric, pediatric and surgical services provided at hospitals. Our hospital-based focus enhances our relationships with hospitals and creates opportunities for our affiliated physicians to provide patient care in other areas of the hospital. For example, our physicians may provide care in emergency rooms, nurseries and other departments where access to specialized obstetric, pediatric and anesthesia care may be critical. Because hospitals control access to their units and operating rooms through the awarding of contracts and hospital privileges, we must maintain good relationships with our hospital partners. Our hospital partners benefit from our expertise in managing critical care units and other settings staffed with physician specialists, including managing variable admission rates, operating costs, complex reimbursement systems and other administrative burdens. We also work with our hospital partners to enhance their reputation and market our services to referring physicians, an important source of hospital admissions, within the communities served by those hospitals. In addition, our affiliated physicians work with our hospital partners to develop integrated services programs for solutions within the maternal-fetal, newborn, pediatric continuum of care. Integrated programs provide our hospital partners and us with incremental growth and result in a broader spectrum of care across our specialties and permit us to extend our patient service lines into our existing markets.

Under our contracts with hospitals, we have the responsibility to manage, in many cases exclusively, the provision of physician services for hospital-based units, such as NICUs, and other hospital settings. We typically are responsible for billing patients and third-party payors for services rendered by our affiliated physicians separately from other related charges billed by the hospital or other physicians to the same payors. Some of our hospital contracts require hospitals to pay us administrative fees. Some contracts provide for fees if the hospital does not generate sufficient patient volume in order to guarantee that we receive a specified minimum revenue level. We also receive fees from hospitals for administrative services performed by our affiliated physicians providing medical director services at the hospital. Administrative fees accounted for approximately 7% of our net patient service revenue during 2012. Some of our contracts with hospitals require us to indemnify them and their affiliates for losses resulting from the negligence of our affiliated physicians. Our hospital contracts typically have terms of one to three years which can be terminated without cause by either party upon prior written notice, and renew automatically for additional terms of one to three years unless terminated early by any party. While we have in most cases been able to renew these arrangements, hospitals may cancel or not renew our arrangements, or reduce or eliminate our administrative fees in the future.

Third-Party Payors

Our relationships with government-sponsored plans, including Medicaid and Medicare, managed care organizations and commercial health insurance payors are vital to our business. We seek to maintain professional working relationships with our third-party payors, streamline the administrative process of billing and collection, and assist our patients and their families in understanding their health insurance coverage and any balances due for co-payments, co-insurance, deductibles or out-of-network benefit limitations. In addition, through our quality initiatives and continuing research and education efforts, we have sought to enhance clinical care provided to patients, which we believe benefits third-party payors by contributing to improved patient outcomes and reduced long-term health system costs.

We receive compensation for professional services provided by our affiliated physicians to patients based upon rates for specific services provided, principally from third-party payors. Our billed charges are substantially the same for all parties in a particular geographic area, regardless of the party responsible for paying the bill for

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our services. A significant portion of our net patient service revenue is received from government-sponsored plans, principally state Medicaid programs. Medicaid programs pay for medical and health-related services for certain individuals and families with low incomes and resources and are jointly funded by the federal government and state governments. Medicaid programs can be either standard fee-for-service payment programs or managed care programs in which states have contracted with health insurance companies to run local or state-wide health plans with features similar to health maintenance organizations. Our compensation rates under standard Medicaid programs are established by state governments and are not negotiated. Rates under Medicaid managed care programs are negotiated but are similar to rates established under standard Medicaid programs. Although Medicaid rates vary across the states, these rates are generally much lower in comparison to private-sector health plan rates. In November 2012, the Centers for Medicare & Medicaid Services (“CMS”) adopted a rule under the “Patient Protection and Affordable Care Act,” (the “Affordable Care Act” formerly referred to as the “Healthcare Reform Act”) that would allow physicians who provide eligible primary care services to generally be paid at the Medicare reimbursement rates in effect in calendar years 2013 and 2014 instead of state-established Medicaid reimbursement rates. Generally, state Medicaid reimbursement rates are lower than federally-established Medicare rates. See Item 1A. Risk Factors—“State budgetary constraints could have an adverse effect on our reimbursement from Medicaid programs.”

Medicare is a health insurance program primarily for individuals 65 years of age and older, certain younger people with disabilities and people with end-stage renal disease. The program is provided without regard to income or assets and offers beneficiaries different ways to obtain their medical benefits. The most common option selected today by Medicare beneficiaries is the traditional fee-for-service payment system. The other options include managed care, preferred provider organizations, private fee-for-service and specialty plans. Medicare compensation rates are generally much lower in comparison to private-sector health plans. Because we provide anesthesia services to a wide array of patients, including Medicare beneficiaries, a portion of our patients’ services are reimbursed by Medicare.

In order to participate in government programs, we and our affiliated practices must comply with stringent and often complex enrollment and reimbursement requirements. Different states also impose differing standards for their Medicaid programs. See “Government Regulation—Government Reimbursement Requirements.”

We also receive compensation pursuant to contracts with commercial payors that offer a wide variety of health insurance products, such as health maintenance organizations, preferred provider organizations and exclusive provider organizations that are subject to various state laws and regulations, as well as self-insured organizations subject to federal Employee Retirement Income Security Act (“ERISA”) requirements. We seek to secure mutually agreeable contracts with payors that enable our affiliated physicians to be listed as in-network participants within the payors’ provider networks. We generally contract with commercial payors through our affiliated professional contractors. Subject to applicable laws and regulations, the terms, conditions and compensation rates of our contracts with commercial third-party payors are negotiated and often vary widely across markets and among payors. In some cases, we contract with organizations that establish and maintain provider networks and then rent or lease such networks to the actual payor. Our contracts with commercial payors typically provide for discounted fee-for-service arrangements and grant each party the right to terminate the contracts without cause upon prior written notice. In addition, these contracts generally give commercial payors the right to audit our billings and related reimbursements for professional and other services provided by or through our affiliated physicians.

If we do not have a contractual relationship with a health insurance payor, we generally bill the payor our full billed charges. If payment is less than billed charges, we bill the balance to the patient, subject to state and federal laws regulating such billing. Although we maintain standard billing and collections procedures with appropriate discounts for prompt payment, we also provide discounts in certain hardship situations where patients and their families do not have financial resources necessary to pay the amount due for services rendered. Any amounts written-off related to private-pay patients are based on the specific facts and circumstances related to each individual patient account.

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Referring and Collaborating Physicians

Our relationships with our referring and collaborating physicians are critical to our success. Our affiliated physicians seek to establish and maintain professional relationships with referring physicians in the communities where they practice. Because patient volumes at our NICUs are based in part on referrals from other physicians, particularly obstetricians, it is important that we are responsive to the needs of referring physicians in the communities in which we operate. We believe that our community presence, through our hospital coverage and outpatient clinics, assists referring obstetricians, office-based pediatricians and family physicians with their practices. Our affiliated physicians are able to provide comprehensive maternal-fetal, newborn and pediatric subspecialty care to patients using the latest advances in methodologies, supporting the local referring physician community with 24-hours-a-day, seven-days-a-week on-site or on-call coverage.

Our affiliated anesthesiologists seek to establish and maintain professional relationships with collaborating physicians, such as surgeons, and other healthcare providers. Our affiliated anesthesiologists play an important role for surgeons because they provide medical care to the patient throughout the surgical experience. This care includes evaluation of the patient prior to surgery, consultations with the surgical team, providing pain control and support of life functions during surgery and supervising care following surgery through the discharge of the patient from the recovery unit. Accordingly, our affiliated anesthesiologists are focused on delivering quality services to enhance the reputation and satisfaction of collaborating surgeons.

Affiliated Physicians and Practice Groups

Our relationships with our affiliated physicians are important. Our affiliated physicians are organized in traditional practice group structures. In accordance with applicable state laws, our affiliated practice groups are responsible for the provision of medical care to patients. Our affiliated practice groups are separate legal entities organized under state law as professional associations, corporations and partnerships, which we sometimes refer to as “our affiliated professional contractors.” Each of our affiliated professional contractors is owned by a licensed physician affiliated with the Company through employment or another contractual relationship. Our national infrastructure enables more effective and efficient sharing of new discoveries and clinical outcomes data, including implementation of best demonstrated processes, and affords access to our sophisticated information systems, and clinical research and education.

Our affiliated professional contractors employ or contract with physicians to provide clinical services in certain states and Puerto Rico. In most of our affiliated practice groups, each physician has entered into an employment agreement with us or one of our affiliated professional contractors providing for a base salary and incentive bonus eligibility and typically having a term of three to five years. We are typically responsible for billing patients and third-party payors for services rendered by our affiliated physicians and, with respect to services provided in a hospital, separately from other charges billed by hospitals to the same payors. Each physician must hold a valid license to practice medicine in the state in which he or she provides patient care and must become a member of the medical staff, with appropriate privileges, at each hospital at which he or she practices. Substantially all the physicians employed by us or our affiliated professional contractors have agreed not to compete within a specified geographic area for a certain period after termination of employment. Although we believe that the non-competition covenants of our affiliated physicians are reasonable in scope and duration and therefore enforceable under applicable state laws, we cannot predict whether a court or arbitration panel would enforce these covenants. Our hospital contracts also typically require that we and the physicians performing services maintain minimum levels of professional and general liability insurance. We negotiate those policies and contract and pay the premiums for such insurance on behalf of the physicians.

Each of our affiliated professional contractors has entered into a comprehensive management agreement with a subsidiary of MEDNAX, Inc. as manager. These agreements are long-term in nature, and in most cases permanent, subject only to a right of termination by the manager (except in the case of gross negligence, fraud or illegal acts of the manager). Under the terms of these management agreements, the manager is typically paid for

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its services based on the performance of the applicable practice group. See “Government Regulation—Fee Splitting; Corporate Practice of Medicine.”

COMPETITION

Competition in our business is generally based upon a number of factors, including reputation, experience and level of care and our affiliated physicians’ ability to provide cost-effective, quality clinical care. The nature of competition for our hospital-based practices, such as neonatology and anesthesia care, differs significantly from competition for our office-based practices. Our hospital-based practices compete nationally with other health services companies and physician groups for hospital contracts and qualified physicians. In some instances, our hospital-based physicians also compete on a regional or local basis. For example, our neonatologists compete for referrals from local physicians and transports from surrounding hospitals. Our office-based practices, such as maternal-fetal medicine and pediatric cardiology, compete for patients with office-based practices in those subspecialties.

Because our operations consist primarily of physician services provided within hospital-based units, we compete with others for contracts with hospitals to provide services. We also compete with hospitals themselves to provide such services. Hospitals may employ neonatologists or anesthesiologists directly or contract with other physician groups to provide services either on an exclusive or non-exclusive basis. A hospital not otherwise competing with us may begin to do so by opening a new NICU or operating facility, expanding the capacity of an existing NICU, adding operating room suites or, in the case of neonatal services, upgrading the level of its existing NICU. If the hospital chooses to do so, it may award the contract to operate the relevant facility to a competing group or company. Because hospitals control access to their NICUs and operating rooms by awarding contracts and hospital privileges, we must maintain good relationships with our hospital partners. Our contracts with hospitals generally provide that they may be terminated without cause upon prior written notice.

The healthcare industry is highly competitive. Companies in other segments of the industry as well as healthcare-focused and other private equity firms, some of which have financial and other resources greater than ours, may become competitors in providing neonatal, maternal-fetal, other pediatric subspecialty care or anesthesia services.

GOVERNMENT REGULATION

The healthcare industry is governed by a framework of federal and state laws, rules and regulations that are extensive and complex and for which, in many cases, the industry has the benefit of only limited judicial and regulatory interpretation. If we or one of our affiliated practice groups is found to have violated these laws, rules or regulations, our business, financial condition and results of operations could be materially adversely affected. Moreover, the Affordable Care Act signed into law in March 2010 contains numerous provisions that are reshaping the United States healthcare delivery system, and healthcare reform continues to attract significant legislative interest, regulatory activity, new approaches, legal challenges and public attention that create uncertainty and the potential for additional changes. Healthcare reform implementation, additional legislation or regulations, and other changes in government policy or regulation may affect our reimbursement, restrict our existing operations, limit the expansion of our business or impose additional compliance requirements and costs, any of which could have a material adverse effect on our business, financial condition, results of operations, cash flows and the trading price of our common stock. See Item 1A. Risk Factors—“The Affordable Care Act may have a significant effect on our business.”

Licensing and Certification

Each state imposes licensing requirements on individual physicians and clinical professionals, and on facilities operated or utilized by healthcare companies like us. Many states require regulatory approval, including certificates of need, before establishing certain types of healthcare facilities, offering certain services or

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expending amounts in excess of statutory thresholds for healthcare equipment, facilities or programs. We and our affiliated physicians are also required to meet applicable Medicaid provider requirements under state laws and regulations and Medicare provider requirements under federal law and regulations.

Fee Splitting; Corporate Practice of Medicine

Many states have laws that prohibit business corporations, such as MDX, from practicing medicine, employing physicians to practice medicine, exercising control over medical decisions by physicians, or engaging in certain arrangements, such as fee splitting, with physicians. In light of these restrictions, we operate by maintaining long-term management contracts through our subsidiaries with affiliated professional contractors, which employ or contract with physicians to provide physician professional services. Under these arrangements, our manager subsidiaries perform only non-medical administrative services, do not represent that they offer medical services and do not exercise influence or control over the practice of medicine by the physicians employed by the affiliated professional contractors. In states where fee splitting with a business corporation or manager is prohibited, the fees that are received from the affiliated professional contractors have been established on a basis that we believe complies with applicable laws. Although the relevant laws in these states have been subject to limited judicial and regulatory interpretation, we believe that we are in compliance with applicable state laws in relation to the corporate practice of medicine and fee splitting. However, regulatory authorities or other parties, including our affiliated physicians, may assert that, despite these arrangements, we or our manager subsidiaries are engaged in the corporate practice of medicine or that the contractual arrangements with the affiliated professional contractors constitute unlawful fee splitting, in which case we could be subject to administrative, civil or criminal remedies or penalties, the contracts could be found legally invalid and unenforceable, in whole or in part, or we could be required to restructure our contractual arrangements with our affiliated professional contractors.

Fraud and Abuse Provisions

Existing federal laws governing Medicaid, Medicare and other federal healthcare programs (the “FHC Programs”), as well as similar state laws, impose a variety of fraud and abuse prohibitions on healthcare companies like us. These laws are interpreted broadly and enforced aggressively by multiple government agencies, including the Office of Inspector General of the Department of Health and Human Services, the Department of Justice (the “DOJ”) and various state authorities. In addition, in the Deficit Reduction Act of 2005, Congress established a Medicaid Integrity Program to enhance federal and state efforts to detect Medicaid fraud, waste and abuse and provide financial incentives for states to enact their own false claims legislation as an additional enforcement tool against Medicaid fraud and abuse. Since then, a growing number of states have enacted healthcare fraud and abuse legislation.

The fraud and abuse laws include extensive federal and state regulations applicable to our financial relationships with hospitals, referring physicians and other healthcare entities. In particular, the federal anti-kickback statute prohibits the offer, payment, solicitation or receipt of any remuneration in return for either referring Medicaid, Medicare or other FHC Program business, or purchasing, leasing, ordering, or arranging for or recommending any service or item for which payment may be made by an FHC Program. In addition, federal physician self-referral legislation, commonly known as the “Stark Law,” prohibits a physician from ordering certain designated health services reimbursable by Medicare from an entity with which the physician has a prohibited financial relationship. These laws are broadly worded and, in the case of the anti-kickback statute, have been broadly interpreted by federal courts, and potentially subject many healthcare business arrangements to government investigation and prosecution, which can be costly and time consuming.

Violations of these laws are punishable by substantial penalties, including monetary fines, civil penalties, administrative remedies, criminal sanctions (in the case of the anti-kickback statute), exclusion from participation in FHC Programs and forfeiture of amounts collected in violation of such laws, any of which could have an adverse effect on our business and results of operations. Many of the states in which we operate also have similar

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anti-kickback and self-referral laws which are applicable to our government and non-government business and which also authorize substantial penalties for violations.

There are a variety of other types of federal and state fraud and abuse laws, including laws authorizing the imposition of criminal, civil and administrative penalties for filing false or fraudulent claims for reimbursement with government healthcare programs. These laws include the civil False Claims Act (“FCA”), which prohibits the submitting of or causing to be submitted false claims to the federal government or federal government programs, including Medicaid, Medicare, the TRICARE program for military dependents and retirees, and the Federal Employees Health Benefits Program. Substantial civil fines and multiple damages, along with other remedies, can be imposed for violating the FCA. Furthermore, proving a violation of the FCA requires only that the government show that the individual or company that submitted or caused to be submitted an allegedly false claim acted in “reckless disregard” of the truth or falsity of the claim, notwithstanding that there may have been no intent to defraud the government program and no actual knowledge that the claim was false (which typically are required to be shown to sustain a criminal conviction). The FCA also applies to the improper retention of known overpayments and includes “whistleblower” provisions that permit private citizens to sue a claimant on behalf of the government and thereby share in the amounts recovered under the law and to receive additional remedies. In recent years, many cases have been brought against healthcare companies by such “whistleblowers,” which have resulted in judgments or, more often, settlements involving substantial payments to the government by the companies involved. It is anticipated that the number of such actions against healthcare companies will continue to increase with the enactment of a growing number of state false claims acts and certain amendments to the FCA recently enacted by Congress and enhanced government enforcement.

In addition, federal and state agencies that administer healthcare programs have at their disposal statutes, commonly known as “civil money penalty laws,” that authorize substantial administrative fines and exclusion from government programs in cases where an individual or company that filed a false claim, or caused a false claim to be filed, knew or should have known that the claim was false or fraudulent. As under the FCA, it often is not necessary for the agency to show that the claimant had actual knowledge that the claim was false or fraudulent in order to impose these penalties.

The civil and administrative false claims statutes are being applied in an increasingly broader range of circumstances. For example, government authorities have asserted that claiming reimbursement for services that fail to meet applicable quality standards may, under certain circumstances, violate these statutes. Government authorities also often take the position, now with support from recent amendments to the FCA, that claims for services that were induced by kickbacks, Stark Law violations or other illicit marketing schemes are fraudulent and, therefore, violate the false claims statutes. Many of the laws and regulations referenced above can be used in conjunction with each other.

If we or our affiliated professional contractors were excluded from any government-sponsored healthcare programs, not only would we be prohibited from submitting claims for reimbursement under such programs, but we also would be unable to contract with other healthcare providers, such as hospitals, to provide services to them. It could also adversely affect our or our affiliated professional contractors’ ability to contract with, or to obtain payment from, non-governmental payors.

Although we intend to conduct our business in compliance with all applicable federal and state fraud and abuse laws, many of the laws and regulations applicable to us, including those relating to billing and those relating to financial relationships with physicians and hospitals, are broadly worded and may be interpreted or applied by prosecutorial, regulatory or judicial authorities in ways that we cannot predict. Accordingly, we cannot assure you that our arrangements or business practices will not be subject to government scrutiny or be alleged or found to violate applicable fraud and abuse laws. Moreover, the standards of business conduct expected of healthcare companies under these laws and regulations have become more stringent in recent years, even in instances where there has been no change in statutory or regulatory language. If there is a determination

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by government authorities that we have not complied with any of these laws and regulations, our business, financial condition and results of operations could be materially adversely affected. See “Government Investigations.”

Government Reimbursement Requirements

In order to participate in the various state Medicaid programs and in the Medicare program, we and our affiliated practices must comply with stringent and often complex enrollment and reimbursement requirements. Moreover, different states impose differing standards for their Medicaid programs. While our compliance program requires that we and our affiliated practices adhere to the laws and regulations applicable to the government programs in which we participate, our failure to comply with these laws and regulations could negatively affect our business, financial condition and results of operations. See “Government Regulation—Fraud and Abuse Provisions,” “Government Regulation—Compliance Program,” “Government Investigations” and “Other Legal Proceedings,” and Item 1A. Risk Factors—“Government programs or private insurers may limit, reduce or make retroactive adjustments to reimbursement amounts or rates,” “We may become subject to billing investigations by federal and state government authorities” and “The healthcare industry is highly regulated, and government authorities may determine that we have failed to comply with applicable laws or regulations.”

In addition, Medicaid, Medicare and other government healthcare programs (such as the TRICARE program) are subject to statutory and regulatory changes, administrative rulings, interpretations and determinations, requirements for utilization review and new governmental funding restrictions, all of which may materially increase or decrease program payments as well as affect the cost of providing services and the timing of payments to providers. Moreover, because these programs generally provide for reimbursement on a fee-schedule basis rather than on a charge-related basis, we generally cannot increase our revenue by increasing the amount we charge for our services. To the extent our costs increase, we may not be able to recover our increased costs from these programs, and cost containment measures and market changes in non-governmental insurance plans have generally restricted our ability to recover, or shift to non-governmental payors, these increased costs. In attempts to limit federal and state spending, there have been, and we expect that there will continue to be, a number of proposals to limit or reduce Medicaid and Medicare reimbursement for various services. Our business may be significantly and adversely affected by any such changes in reimbursement policies and other legislative initiatives aimed at reducing healthcare costs associated with Medicaid, Medicare and other government healthcare programs.

Our business also could be adversely affected by reductions in or limitations of reimbursement amounts or rates under these government programs, reductions in funding of these programs or elimination of coverage for certain individuals or treatments under these programs.

Antitrust

The healthcare industry is subject to close antitrust scrutiny. In recent years, the Federal Trade Commission (the “FTC”), the DOJ, and state Attorneys General have increasingly taken steps to review and, in some cases, take enforcement action against business conduct and acquisitions in the healthcare industry. Violations of antitrust laws may be punishable by substantial penalties, including significant monetary fines, civil penalties, criminal sanctions, consent decrees and injunctions prohibiting certain activities or requiring divestiture or discontinuance of business operations. Any of these penalties could have a material adverse effect on our business, financial condition and results of operations.

HIPAA and Other Privacy Laws

Numerous federal and state laws, rules and regulations govern the collection, dissemination, use and confidentiality of protected health information, including the federal Health Insurance Portability and Accountability Act of 1996, as amended (“HIPAA”), and its implementing regulations, violations of which are

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punishable by monetary fines, civil penalties and, in some cases, criminal sanctions. As part of our medical record keeping, third-party billing, research and other services, we and our affiliated practices collect and maintain protected health information on the patients that we serve.

Pursuant to HIPAA, the U.S. Department of Health and Human Services (“HHS”) has adopted standards to protect the privacy and security of individually identifiable health information, known as the Privacy Standards and Security Standards. HHS’ Privacy Standards apply to medical records and other individually identifiable health information in any form, whether electronic, paper or oral, that is used or disclosed by healthcare providers, hospitals, health plans and healthcare clearinghouses, which are known as “Covered Entities.” We have implemented privacy policies and procedures, including training programs, designed to be compliant with the HIPAA Privacy Standards.

HHS’ Security Standards require healthcare providers to implement administrative, physical and technical safeguards to protect the integrity, confidentiality and availability of individually identifiable health information that is electronically received, maintained or transmitted (including between us and our affiliated practices). We have implemented security policies, procedures and systems designed to facilitate compliance with the HIPAA Security Standards.

In February 2009, Congress enacted the Health Information Technology for Economic and Clinical Health Act (“HITECH”) as part of the ARRA. Among other changes to the law governing protected health information, HITECH strengthens and expands HIPAA, increases penalties for violations, gives patients new rights to restrict uses and disclosures of their health information, and imposes a number of privacy and security requirements directly on our “Business Associates,” which are third-parties that perform functions or services for us or on our behalf. Specifically, HITECH requires that Covered Entities and Business Associates alike report any unauthorized use or disclosure of individually identifiable health information that meets the definition of a breach, to the affected individuals, HHS and, depending on the number of affected individuals, the media for the affected market. HITECH also authorizes state Attorneys General to bring civil actions in response to violations of HIPAA that threaten the privacy of state residents. As a result, we have made revisions to our privacy policies and procedures so that we are compliant with HITECH requirements.

In addition to the federal HIPAA and HITECH requirements, numerous other state and certain other federal laws protect the confidentiality of patient information, including state medical privacy laws, state social security number protection laws, human subjects research laws and federal and state consumer protection laws. In some cases, state laws are more stringent than HIPAA and therefore, are not preempted by HIPAA.

Environmental Regulations

Our healthcare operations generate medical waste that must be disposed of in compliance with federal, state and local environmental laws, rules and regulations. Our office-based operations are subject to compliance with various other environmental laws, rules and regulations. Such compliance does not, and we anticipate that such compliance will not, materially affect our capital expenditures, financial position or results of operations.

Compliance Program

We maintain a compliance program that reflects our commitment to complying with all laws, rules and regulations applicable to our business and that meets our ethical obligations in conducting our business (the “Compliance Program”). We believe our Compliance Program provides a solid framework to meet this commitment and our obligations as a provider of health care services, including:

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The foundation of our Compliance Program is our Code of Conduct, which is intended to be a comprehensive statement of the ethical and legal standards governing the daily activities of our employees, affiliated professionals, independent contractors, officers and directors. All our personnel are required to abide by, and are given thorough education regarding, our Code of Conduct. In addition, all employees and affiliated professionals are expected to report incidents that they believe in good faith may be in violation of our Code of Conduct. We maintain a toll-free helpline to permit individuals to report compliance concerns on an anonymous basis and obtain answers to questions about our Code of Conduct. Our Compliance Program, including our Code of Conduct, is administered by our Chief Compliance Officer with oversight by our Chief Executive Officer, Compliance Committee and Board of Directors. Copies of our Code of Conduct and our Code of Professional Conduct—Finance are available on our website, www.mednax.com. Our Internet website and the information contained therein or connected thereto are not incorporated into or deemed a part of this Form 10-K. Any amendments or waivers to our Code of Professional Conduct—Finance will be promptly disclosed on our website following the date of any such amendment or waiver.

GOVERNMENT INVESTIGATIONS

We expect that audits, inquiries and investigations from government authorities, agencies, contractors and payors will occur in the ordinary course of business. Such audits, inquiries and investigations and their ultimate resolutions, individually or in the aggregate, could have a material adverse effect on our business, financial condition, results of operations, cash flows and the trading price of our common stock.

OTHER LEGAL PROCEEDINGS

In the ordinary course of our business, we become involved in pending and threatened legal actions and proceedings, most of which involve claims of medical malpractice related to medical services provided by our affiliated physicians. Our contracts with hospitals generally require us to indemnify them and their affiliates for losses resulting from the negligence of our affiliated physicians. We may also become subject to other lawsuits that could involve large claims and significant defense costs. We believe, based upon a review of pending actions and proceedings, that the outcome of such legal actions and proceedings will not have a material adverse effect on our business, financial condition or results of operations. The outcome of such actions and proceedings, however, cannot be predicted with certainty and an unfavorable resolution of one or more of them could have a material adverse effect on our business, financial condition, results of operations, cash flows and the trading price of our common stock.

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Although we currently maintain liability insurance coverage intended to cover professional liability and certain other claims, we cannot assure that our insurance coverage will be adequate to cover liabilities arising out of claims asserted against us in the future where the outcomes of such claims are unfavorable to us. With respect to professional liability risk, we self-insure a significant portion of this risk through our wholly owned captive insurance subsidiary. Liabilities in excess of our insurance coverage, including coverage for professional liability and certain other claims, could have a material adverse effect on our business, financial condition and results of operations. See “Professional and General Liability Coverage.”

PROFESSIONAL AND GENERAL LIABILITY COVERAGE

We maintain professional and general liability insurance policies with third-party insurers on a claims-made basis, subject to deductibles, self-insured retention limits, policy aggregates, exclusions, and other restrictions, in accordance with standard industry practice. We believe that our insurance coverage is appropriate based upon our claims experience and the nature and risks of our business. However, we cannot assure that any pending or future claim will not be successful or if successful will not exceed the limits of available insurance coverage.

Our business entails an inherent risk of claims of medical malpractice against our affiliated physicians and us. We contract and pay premiums for professional liability insurance that indemnifies us and our affiliated healthcare professionals on a claims-made basis for losses incurred related to medical malpractice litigation. Professional liability coverage is required in order for our affiliated physicians to maintain hospital privileges. Our self-insured retention under our professional liability insurance program is maintained primarily through a wholly owned captive insurance subsidiary. We record estimates in our Consolidated Financial Statements for our liabilities for self-insured retention amounts and claims incurred but not reported based on an actuarial valuation using historical loss information, claim emergence patterns and various actuarial assumptions. Liabilities for claims incurred but not reported are not discounted. Because many factors can affect historical and future loss patterns, the determination of an appropriate reserve involves complex, subjective judgment, and actual results may vary significantly from estimates. If the self-insured retention amounts and other amounts that we are actually required to pay materially exceed the estimates that have been reserved, our financial condition, results of operations and cash flows could be materially adversely affected.

EMPLOYEES AND PROFESSIONALS UNDER CONTRACT

In addition to the over 2,100 practicing physicians affiliated with us as of December 31, 2012, we employed or contracted with over 2,200 other clinical professionals, including advanced practice nurses, and approximately 3,600 other full-time and part-time employees.

GEOGRAPHIC COVERAGE

We provide services in 34 states, including Alaska, Arizona, Arkansas, California, Colorado, Florida, Georgia, Idaho, Indiana, Illinois, Iowa, Kansas, Kentucky, Louisiana, Maryland, Michigan, Missouri, Montana, Nevada, New Jersey, New Mexico, New York, North Carolina, Ohio, Oklahoma, Oregon, Pennsylvania, South Carolina, Tennessee, Texas, Utah, Virginia, Washington and West Virginia, and Puerto Rico. During 2012, approximately 59% of our net patient service revenue was generated by operations in our five largest states. Our operations in Texas accounted for approximately 24% of our net patient service revenue for the same period. Although we continue to seek to diversify the geographic scope of our operations, primarily through acquisitions of physician group practices, we may not be able to implement successfully or realize the expected benefits of any of these initiatives. Adverse changes or conditions affecting states in which our operations are concentrated, such as healthcare reforms, changes in laws and regulations, reduced Medicaid or Medicare reimbursements, an increase in the income level required to qualify for government healthcare programs or government investigations, may have a material adverse effect on our business, financial condition and results of operations.

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SERVICE MARKS

We have registered the service marks “MEDNAX National Medical Group and Design,” “Pediatrix Medical Group and Design,” “Obstetrix Medical Group and Design,” “American Anesthesiology and Design,” “BabySteps,” the “Baby Design,” “Pediatrix University,” “Pediatrix University-A University Without Walls,” and “QualitySteps,” among others, with the United States Patent and Trademark Office. In addition, we have pending applications to register the service marks “Quantum Clinical Navigation Systems,” “Pediatrix Cardiology and Design,” “Pediatrix International and Design,” “NEO Conference and Design” and “Specialty Review in Neonatology and Design,” among others.

AVAILABLE INFORMATION

Our annual proxy statements, annual reports on Form 10-K, quarterly reports on Form 10-Q, current reports on Form 8-K and amendments to those statements and reports filed or furnished pursuant to Section 13(a) or 15(d) of the Securities Exchange Act of 1934 are available free of charge and may be printed out through our Internet website, www.mednax.com, as soon as reasonably practicable after we electronically file such material with, or furnish it to, the SEC. Our proxy statements and reports may also be obtained directly from the SEC’s Internet website at www.sec.gov or from the SEC’s Public Reference Room at 100 F Street, N.E., Washington, D.C. 20549. Information on the operation of the Public Reference Room can be obtained by calling 1-800-SEC-0330. Our Internet website and the information contained therein or connected thereto are not incorporated into or deemed a part of this Form 10-K.

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Our business is subject to a number of factors that could materially affect future developments and performance. In addition to factors affecting our business that have been described elsewhere in this Form 10-K, any of the following risks could have a material adverse effect on our business, financial condition, results of operations, cash flows and the trading price of our common stock.

Continuing unfavorable economic conditions could have an adverse effect on our business.

The United States is continuing to be affected by unfavorable economic conditions and slow economic growth. The number of unemployed and under-employed workers remains significant. During the year ended December 31, 2012, the percentage of patient services being reimbursed under government-sponsored healthcare programs increased as compared to the year ended December 31, 2011. We could experience additional shifts if economic conditions do not improve or deteriorate further and possibly lower patient volumes. These conditions could also lead to additional increases in the number of unemployed and under-employed workers and a decline in the number of private employers that offer healthcare insurance coverage to their employees. Employers that do offer healthcare coverage may increase the required contributions from employees to pay for their coverage and increase patient responsibility amounts. As a consequence, the number of patients who participate in government-sponsored programs or are uninsured could increase. In addition, we cannot predict whether the Affordable Care Act will increase or decrease the number of patients with private healthcare insurance, obtained either through employers or the to be established insurance exchanges. Payments received from government-sponsored programs are substantially less than payments received from managed care and other third-party payors. A payor mix shift from managed care and other third-party payors to government payors may result in an increase in our estimated provision for contractual adjustments and uncollectibles and a corresponding decrease in our net patient service revenue. Further increases in the government component of our payor mix at the expense of other third-party payors could result in a significant reduction in our average reimbursement rates.

State budgetary constraints could have an adverse effect on our reimbursement from Medicaid programs.

As a result of slow economic growth, many states are continuing to collect less revenue than they did in prior years and as a consequence are facing significant budget shortfalls and underfunded pension and other obligations. Although the shortfalls for the budget year beginning in July 2012 were lower than in recent years, they are still significant by historical standards. Financial conditions in the states where the Company does business could lead to reduced or delayed funding for Medicaid programs and, in turn, reduced or delayed reimbursement for physician services, which could adversely affect our results of operations, cash flows and financial condition.

The birth rate in the United States has declined and may continue to fall.

Provisional data for 2011 indicates that the births in the United States declined by 1.0% from 2010, which fell by 3.0% from 2009. Although the provisional data is not yet available for 2012, we expect that birth trends may have improved in 2012 as compared to the prior few years. However, any declines in births could have an adverse effect on our patient volumes and revenue.

The Affordable Care Act may have a significant effect on our business.

In March 2010, the Affordable Care Act was enacted. The Affordable Care Act contains a number of provisions that could affect us over the next several years. These provisions include establishing health insurance exchanges to facilitate the purchase of qualified health plans, expanding Medicaid eligibility, subsidizing insurance premiums and creating requirements and incentives for businesses to provide healthcare benefits. Other provisions contain changes to healthcare fraud and abuse laws and expand the scope of the Federal False Claims Act.

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The Affordable Care Act contains numerous other measures that could also affect us. For example, payment modifiers are to be developed that will differentiate payments to physicians under federal healthcare programs based on quality of care. In addition, other provisions authorize voluntary demonstration projects relating to the bundling of payments for episodes of hospital care and the sharing of cost savings achieved under the Medicare program.

In October 2011, the Centers for Medicare and Medicaid Services (“CMS”) issued a final rule under the Affordable Care Act that is intended to allow physicians, hospitals and other health care providers to coordinate care for Medicare beneficiaries through Accountable Care Organizations (“ACOs”). ACOs are entities consisting of healthcare providers and suppliers organized to deliver services to Medicare beneficiaries and eligible to receive a share of any cost savings the entity can achieve by delivering services to those beneficiaries at a cost below a set baseline and with sufficient quality of care. We will continue to evaluate the impact of the ACO regulations on our business and operations.

Many of the Affordable Care Act’s most significant reforms, such as the establishment of state-based and federally facilitated insurance exchanges, do not take effect until 2014 and thereafter, and their details will be shaped significantly by implementing regulations that have yet to be finalized. In 2012, the U.S. Supreme Court heard challenges to the constitutionality of the Affordable Care Act’s individual mandate to purchase health insurance and to the viability of certain other provisions of the law. The Supreme Court issued a decision upholding most of the Affordable Care Act and determined that requiring individuals to maintain “minimum essential” health insurance coverage or pay a penalty to the Internal Revenue Service was within Congress’ constitutional taxing authority. However, the Supreme Court struck down a provision in the Affordable Care Act that penalized states that choose not to expand their Medicaid programs through an increase in the Medicaid eligibility income limit from a state’s current eligibility levels to 133% of the federal poverty limit. As a result of the Supreme Court’s ruling, it is unclear to what extent states will expand their Medicaid programs by raising the income limit to 133% of the federal poverty level and whether there will be more uninsured patients in 2014 than anticipated when the Affordable Care Act was enacted.

Federal and state agencies are expected to continue to implement provisions of the Affordable Care Act and to develop regulations following the Supreme Court’s decision. However, given the complexity and the number of changes expected as a result of the Affordable Care Act, as well as the implementation timetable for many of them, we cannot predict the ultimate impacts of the Affordable Care Act, as they may not be known for several years. The Affordable Care Act also remains subject to continuing legislative scrutiny, including efforts by Congress to amend or repeal a number of its provisions. As a result, we cannot predict with any assurance the ultimate effect of the Affordable Care Act on our Company, nor can we provide any assurance that its provisions will not have a material adverse effect on our business, financial condition, results of operations or cash flows.

Expanding eligibility of government-sponsored programs could adversely affect our reimbursement.

In February 2009, Congress reauthorized the State Children’s Health Insurance Program (“SCHIP”) through September 2013 and expanded its eligibility coverage. Further expansion of SCHIP eligibility and the Affordable Care Act’s expansion of Medicaid coverage could cause patients who otherwise would have participated in private healthcare insurance programs to participate in government-sponsored programs. Additional reform efforts could change the eligibility requirements for Medicaid and for other government-sponsored programs and could increase the number of patients who participate in such programs or the number of uninsured patients. Payments received from government-sponsored programs are substantially less than payments received from managed care and other third-party payors. A payor mix shift from managed care and other third-party payors to government payors may result in an increase in our estimated provision for contractual adjustments and uncollectibles and a corresponding decrease in our net patient service revenue. Further increases in the government component of our payor mix at the expense of other third-party payors could also result in a significant reduction in our average reimbursement rates.

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Government programs or private insurers may limit, reduce or make retroactive adjustments to reimbursement amounts or rates.

A significant portion of our net patient revenue is derived from payments made by government-sponsored healthcare programs, principally Medicaid. These government programs, as well as private insurers, have taken and may continue to take steps, including a movement toward increased use of managed care organizations, value-based purchasing, and new patient care models, to control the cost, eligibility for, use and delivery of healthcare services as a result of budgetary constraints and cost containment pressures due to unfavorable economic conditions, rising healthcare costs and for other reasons, including those described above under Item 1. Business—“Government Regulation—Government Reimbursement Requirements.” These government programs and private insurers may attempt other measures to control costs, including bundling of services and denial of or reduction in reimbursement for certain services and treatments. As a result, payments from government programs or private payors may decrease significantly. Also, any adjustment in Medicare reimbursement rates may have a detrimental impact on our reimbursement rates not only for Medicare patients, but also because Medicaid and other third-party payors often base their reimbursement rates on a percentage of Medicare reimbursement rates. Our business also may be materially affected by limitations on or reductions in reimbursement amounts or rates or elimination of coverage for certain individuals or treatments. Moreover, because government programs generally provide for reimbursements on a fee-schedule basis rather than on a charge-related basis, we generally cannot increase our revenues from these programs by increasing the amount we charge for our services. To the extent our costs increase, we may not be able to recover our increased costs from these programs, and cost containment measures and market changes in non-governmental insurance plans have generally restricted our ability to recover, or shift to non-governmental payors, these increased costs. In addition, funds we receive from third-party payors are subject to audit with respect to the proper billing for physician and ancillary services and, accordingly, our revenue from these programs may be adjusted retroactively. Any retroactive adjustments to our reimbursement amounts could have a material effect on our financial condition, results of operations, cash flows and the trading price of our common stock.

In addition, Medicare reimbursement rates could be reduced due to formulaic rules. Presently, Medicare pays for all physician services based upon a national fee schedule which contains a list of uniform rates. The payment rates under the fee schedule are determined based on national uniform relative value units for the services provided, a geographic adjustment factor and a conversion factor. The fee schedule is adjusted annually based on a complex formula that is linked in part to the use of services by Medicare beneficiaries and the growth in gross domestic product. Since 2002, this formula has resulted in negative payment updates under the fee schedule that have grown increasingly larger, and Congress has had to take repeated legislative action to reverse scheduled payment reductions, most recently in January 2013, when legislation was enacted to avert a rate reduction and temporarily extend existing Medicare physician payment rates through the end of December 2013. If Congress does not take further action, the Medicare fee schedule will be reduced by approximately 27% effective January 1, 2014. Fee reductions will continue to be scheduled annually and will grow to approximately 40% in cumulative reductions by 2016 unless Congress takes action in the future to modify or reform the mechanism by which payment rates are updated. In addition to the reductions under the Medicare fee schedule, the Budget Control Act of 2011 sets forth across-the-board cuts (“sequestrations”) to Medicare reimbursement rates which are scheduled to begin in April 2013. These annual reductions of 2% apply to mandatory and discretionary spending in the years 2013 to 2021. Unless Congress takes action in the future to modify these sequestrations, Medicare reimbursements will be reduced by 2% annually and will grow to approximately 10% in cumulative reductions by 2021. If no action is taken, reductions in the fee schedule and reductions as a result of the sequestrations could have a material adverse effect on our financial condition, results of operations, cash flows and the trading price of our common stock.

We may become subject to billing investigations by federal and state government authorities.

State and federal statutes impose substantial penalties, including civil and criminal fines, exclusion from participation in government healthcare programs and imprisonment, on entities or individuals (including any individual corporate officers or physicians deemed responsible) that fraudulently or wrongfully bill governmental

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or other third-party payors for healthcare services. In September 2011, CMS issued a final rule requiring states to implement a Medicaid Recovery Audit Contractor (“RAC”) program effective January 1, 2012. States are required to contract with one or more eligible Medicaid RACs to review Medicaid claims for any overpayments or underpayments, and to recoup overpayments from providers on behalf of the state. In addition, federal laws, along with a growing number of state laws, allow a private person to bring a civil action in the name of the government for false billing violations. See Item 1. Business—“Government Regulation—Fraud and Abuse Provisions.” We believe that audits, inquiries and investigations from government agencies will occur from time to time in the ordinary course of our business, which could result in substantial defense costs to us and a diversion of management’s time and attention. We cannot predict whether any future audits, inquiries or investigations, or the public disclosure of such matters, would have a material adverse effect on our business, financial condition, results of operations, cash flows and the trading price of our common stock. See Item 1. Business—“Government Investigations.”

The healthcare industry is highly regulated, and government authorities may determine that we have failed to comply with applicable laws or regulations.

The healthcare industry and physicians’ medical practices, including the healthcare and other services that we and our affiliated physicians provide, are subject to extensive and complex federal, state and local laws and regulations, compliance with which imposes substantial costs on us. Of particular importance are the provisions summarized as follows:

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In addition, we believe that our business will continue to be subject to increasing regulation, the scope and effect of which we cannot predict. See Item 1. Business—“Government Regulation.”

We may in the future become the subject of regulatory or other investigations or proceedings, and our interpretations of applicable laws, rules and regulations may be challenged. For example, regulatory authorities or other parties may assert that our arrangements with our affiliated professional contractors constitute fee splitting or the corporate practice of medicine and seek to invalidate these arrangements, which could have a material adverse effect on our business, financial condition, results of operations, cash flows and the trading price of our common stock. See Item 1. Business—“Government Regulation—Fee Splitting; Corporate Practice of Medicine.” Regulatory authorities or other parties also could assert that our relationships, including fee arrangements, among our affiliated professional contractors, hospital clients or referring physicians violate the anti-kickback, fee splitting or self-referral laws and regulations or that we have submitted false claims or otherwise failed to comply with government program reimbursement requirements. See Item 1. Business—“Government Regulation—Fraud and Abuse Provisions” and “—Government Reimbursement Requirements.” Such investigations, proceedings and challenges could result in substantial defense costs to us and a diversion of management’s time and attention. In addition, violations of these laws are punishable by monetary fines, civil and criminal penalties, exclusion from participation in government-sponsored healthcare programs, and forfeiture of amounts collected in violation of such laws and regulations, any of which could have a material adverse effect on our business, financial condition, results of operations, cash flows and the trading price of our common stock.

Federal and state laws that protect the privacy and security of protected health information may increase our costs and limit our ability to collect and use that information and subject us to penalties if we are unable to fully comply with such laws.

Numerous federal and state laws and regulations govern the collection, dissemination, use, security and confidentiality of individually identifiable health information. These laws include:

As part of our medical record keeping, third-party billing, research and other services, we collect and maintain protected health information in paper and electronic format. New protected health information standards, whether implemented pursuant to HIPAA, HITECH, congressional action or otherwise, could have a significant effect on the manner in which we handle healthcare-related data and communicate with payors, and compliance with these standards could impose significant costs on us or limit our ability to offer services, thereby negatively impacting the business opportunities available to us.

If we do not comply with existing or new laws and regulations related to protected health information we could be subject to remedies that include monetary fines, civil or administrative penalties or criminal sanctions.

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Government authorities or other parties may assert that our business practices violate antitrust laws.

The healthcare industry is subject to close antitrust scrutiny. In recent years, the FTC, the DOJ and state Attorneys General have taken increasing steps to review and, in some cases, take enforcement action against business conduct and acquisitions in the healthcare industry. Violations of antitrust laws may be punishable by substantial penalties, including significant monetary fines, civil penalties, criminal sanctions, and consent decrees and injunctions prohibiting certain activities or requiring divestiture or discontinuance of business operations. Any of these penalties could have a material adverse effect on our business, financial condition and results of operations.

Our affiliated physicians may not appropriately record or document services they provide.

Our affiliated physicians are responsible for maintaining sufficient supporting documentation for the services they provide. We use this information to seek reimbursement for their services from third-party payors. If our physicians do not appropriately document, or where applicable, code for their services, we could be subjected to administrative, regulatory, civil, or criminal investigations or sanctions and our business, financial condition, results of operations and cash flows could be adversely affected.

We may not find suitable acquisition candidates or successfully integrate our acquisitions. Our acquisitions may expose us to greater business risks and could affect our payor mix.

We have expanded and intend to continue to seek to expand our presence in new and existing metropolitan areas for us by acquiring established neonatal, maternal-fetal, pediatric cardiology and other complementary pediatric subspecialty physician groups and anesthesia care practices.

Our acquisition strategy involves numerous risks and uncertainties, including:

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We may not be able to successfully execute our same-unit and organic growth strategies.

In addition to our acquisition growth strategy, we seek opportunities for increasing revenue from our existing hospital- and office-based operations through same-unit and organic growth strategies. We may not be able to successfully execute our same-unit and organic growth strategies for the following reasons:

We may not be able to maintain effective and efficient information systems or properly safeguard our information systems.

Our operations are dependent on uninterrupted performance of our information systems. Failure to maintain reliable information systems, disruptions in our existing information systems or the implementation of new systems could cause disruptions in our business operations, including errors and delays in billings and collections, difficulty satisfying requirements under hospital contracts, disputes with patients and payors, violations of patient privacy and confidentiality requirements and other regulatory requirements, increased administrative expenses and other adverse consequences.

In addition, information security risks have generally increased in recent years because of new technologies and the increased activities of perpetrators of cyber attacks. A failure in or breach of our information systems as a result of cyber attacks could also disrupt our business, result in the release or misuse of confidential or proprietary information, damage our reputation, and increase our administrative expenses. Although we believe that we have robust information security procedures and other safeguards in place, as cyber threats continue to evolve, we may be required to expend additional resources to continue to enhance our information security measures or to investigate and remediate any information security vulnerabilities. Any of these disruptions or breaches of security could have a material adverse effect on our business, financial condition and results of operations.

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Our employees and business partners may not appropriately secure and protect confidential information in their possession.

Each of our employees and business partners is responsible for the security of the information in our systems and to ensure that private and financial information is kept confidential. Should an employee or business partner not follow appropriate security measures, including those related to cyber threats or attacks, it may result in the release of private or confidential financial information. The release of such information could have a material adverse effect on our business, financial condition, results of operations and cash flows.

We may not be able to successfully recruit and retain qualified physicians to serve as affiliated physicians or independent contractors.

We are dependent upon our ability to recruit and retain a sufficient number of qualified physicians to service existing units at hospitals and our affiliated practices and expand our business. We compete with many types of healthcare providers, including teaching, research and government institutions and other practice groups, for the services of qualified physicians. We may not be able to continue to recruit new physicians or renew contracts with existing physicians on acceptable terms. If we do not do so, our ability to service existing or new hospital units and staff existing or new office-based practices could be adversely affected.

A significant number of our affiliated physicians could leave our affiliated practices or our affiliated professional contractors may be unable to enforce the non-competition covenants of departed physicians.

Our affiliated professional contractors usually enter into employment agreements with our affiliated physicians. Certain of our employment agreements can be terminated without cause by any party upon prior written notice. In addition, substantially all of our affiliated physicians have agreed not to compete within a specified geographic area for a certain period after termination of employment. The law governing non-compete agreements and other forms of restrictive covenants varies from state to state. Although we believe that the non-competition and other restrictive covenants applicable to our affiliated physicians are reasonable in scope and duration and therefore enforceable under applicable state law, courts and arbitrators in some states are reluctant to strictly enforce non-compete agreements and restrictive covenants against physicians. If a substantial number of our affiliated physicians leave our affiliated practices or our affiliated professional contractors are unable to enforce the non-competition covenants in the employment agreements, our business, financial condition, results of operations and cash flows could be materially adversely affected. We cannot predict whether a court or arbitration panel would enforce these covenants.

We may be subject to medical malpractice and other lawsuits not covered by insurance.

Our business entails an inherent risk of claims of medical malpractice against our affiliated physicians and us. We may also be subject to other lawsuits which may involve large claims and significant defense costs. Although we currently maintain liability insurance coverage intended to cover professional liability and other claims, there can be no assurance that our insurance coverage will be adequate to cover liabilities arising out of claims asserted against us where the outcomes of such claims are unfavorable to us. Generally, we self-insure our liabilities to pay retention amounts for professional liability matters through a wholly owned captive insurance subsidiary. Liabilities in excess of our insurance coverage, including coverage for professional liability and other claims, could have a material adverse effect on our business, financial condition, results of operations, cash flows and the trading price of our common stock. See Item 1. Business—“Other Legal Proceedings” and “Professional and General Liability Coverage.”

The reserves that we have established in respect of our professional liability losses are subject to inherent uncertainties and if a deficiency is determined this may lead to a reduction in our net earnings.

We have established reserves for losses and related expenses that represent estimates involving actuarial projections, at a given point in time, of our expectations of the ultimate resolution and administration of costs of losses incurred with respect to professional liability risks for the amount of risk retained by us. Insurance reserves are inherently subject to uncertainty. Our reserve estimates are based on actuarial valuations using historical claims, demographic factors, industry trends, severity and exposure factors and other actuarial assumptions. The

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estimates of projected ultimate losses are developed at least annually. Our reserves could be significantly affected should current and future occurrences differ from historical claim trends and expectations. While claims are monitored closely when estimating reserves, the complexity of the claims and wide range of potential outcomes often hamper timely adjustments to the assumptions used in these estimates. Actual losses and related expenses may deviate, perhaps substantially, from the reserve estimates reflected in our financial statements. If our estimated reserves are determined to be inadequate, we will be required to increase reserves at the time the deficiency is determined. See Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations—“Application of Critical Accounting Policies and Estimates—Professional Liability Coverage.”

We may write-off intangible assets, such as goodwill.

Our intangible assets, which consist primarily of goodwill related to our acquisitions, are subject to annual impairment testing. Under current accounting standards, goodwill is tested for impairment on an annual basis and we may be subject to impairment losses as circumstances change after an acquisition. If we record an impairment loss related to our goodwill, it could have a material adverse effect on our results of operations for the year in which the impairment is recorded.

We may not effectively manage our growth.

We have experienced significant growth in our business and the number of our employees and affiliated physicians in recent years which places significant demands on our financial, operational and management resources. Continued growth may impair our ability to provide our services efficiently and to manage our employees adequately. While we are taking steps to manage our growth, our future results of operations could be materially adversely affected if we are unable to do so effectively.

Our quarterly results will likely fluctuate from period to period.

We have historically experienced and expect to continue to experience quarterly fluctuations in net patient service revenue and net income. For example, we typically experience negative cash flow from operations in the first quarter of each year, principally as a result of bonus payments to affiliated physicians as well as discretionary matching contributions for participants in our qualified contributory savings plans (401(k) Plans). In addition, a significant number of our employees and associated professional contractors (primarily affiliated physicians) exceed the level of taxable wages for social security contributions during the first and second quarters. As a result, we incur a significantly higher payroll tax burden and our net income is lower during those quarters. Moreover, a lower number of calendar days are present in the first and second quarters of the year as compared to the remainder of the year. Because we provide services in the NICU on a 24-hours-a-day basis, 365 days a year, any reduction in service days will have a corresponding reduction in net patient service revenue. In addition, any reduction in office days in our office-based practices will also have a corresponding reduction in net patient service revenue. We also have significant fixed operating costs, including costs for our affiliated physicians, and as a result, are highly dependent on patient volume and capacity utilization of our affiliated physicians to sustain profitability. Quarterly results may also be impacted by the timing of acquisitions and any fluctuation in patient volume. As a result, our results of operations for any quarter are not indicative of results of operations for any future period or full fiscal year.

The value of our common stock may fluctuate.

There has been significant volatility in the market price of securities of healthcare companies generally that we believe in many cases has been unrelated to operating performance. In addition, we believe that certain factors, such as legislative and regulatory developments, including announced regulatory investigations, quarterly fluctuations in our actual or anticipated results of operations, lower revenues or earnings than those anticipated by securities analysts, and general economic and financial market conditions, could cause the price of our common stock to fluctuate substantially.

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We may not be able to collect reimbursements for our services from third-party payors in a timely manner.

A significant portion of our net patient service revenue is derived from reimbursements from various third-party payors, including government-sponsored healthcare plans, private insurance plans and managed care plans, for services provided by our affiliated professional contractors. We are responsible for submitting reimbursement requests to these payors and collecting the reimbursements, and we assume the financial risks relating to uncollectible and delayed reimbursements. In the current healthcare environment, payors continue their efforts to control expenditures for healthcare, including revisions to coverage and reimbursement policies. Due to the nature of our business and our participation in government and private reimbursement programs, we are involved from time to time in inquiries, reviews, audits and investigations by governmental agencies and private payors of our business practices, including assessments of our compliance with coding, billing and documentation requirements. We may be required to repay these agencies or private payors if a finding is made that we were incorrectly reimbursed, or we may be subjected to pre-payment reviews, which can be time-consuming and result in non-payment or delayed payment for the services we provide. We may also experience difficulties in collecting reimbursements because third-party payors may seek to reduce or delay reimbursements to which we are entitled for services that our affiliated physicians have provided. If we are not reimbursed fully and in a timely manner for such services or there is a finding that we were incorrectly reimbursed, our revenue, cash flows and financial condition could be materially adversely affected.

In addition, adverse economic conditions could affect the timeliness and amounts received from our third-party and government payors which would impact our short-term liquidity needs.

Hospitals may terminate their agreements with us, our physicians may lose the ability to provide services in hospitals or administrative fees paid to us by hospitals may be reduced.

Our net patient service revenue is derived primarily from fee-for-service billings for patient care provided within hospital units by our affiliated physicians and from administrative fees paid to us by hospitals. See Item 1. Business—“Relationships with Our Partners—Hospitals.” Our hospital partners may cancel or not renew their contracts with us, reduce or eliminate our administrative fees in the future, or refuse to pay us our administrative fees if we fail to honor the terms of our agreement. Adverse economic conditions could influence future actions of our hospital partners. To the extent that our arrangements with our hospital partners are canceled, or are not renewed or replaced with other arrangements having at least as favorable terms, our business, financial condition and results of operations could be adversely affected. In addition, to the extent our affiliated physicians lose their privileges in hospitals or hospitals enter into arrangements with or employ other physicians, our business, financial condition, results of operations and cash flows could be materially adversely affected.

Hospitals could limit our ability to use our management information systems in our units by requiring us to use their own management information systems.

Our management information systems, including BabySteps^® and Quantum Clinical Navigation Systems are used to support our day-to-day operations and ongoing clinical research and business analysis. If a hospital prohibits us from using our own management information systems, it may interrupt the efficient operation of our information systems which, in turn, may limit our ability to operate important aspects of our business, including billing and reimbursement as well as research and education initiatives. This inability to use our management information systems at hospital locations may have a material adverse effect on our business, financial condition, results of operations and cash flows.

Our industry is already competitive and could become more competitive.

The healthcare industry is highly competitive and subject to continual changes in the methods by which services are provided and the manner in which healthcare providers are selected and compensated. Because our operations consist primarily of physician services provided within hospital-based units, we compete with other healthcare services companies and physician groups for contracts with hospitals to provide our services to patients. We also face competition from hospitals themselves to provide our services. Companies in other healthcare industry segments, some of which have greater financial and other resources than ours, may become

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competitors in providing neonatal, maternal-fetal, pediatric subspecialty care or anesthesia care. Additionally, we face competition from healthcare-focused and other private equity firms. We may not be able to continue to compete effectively in this industry, additional competitors may enter metropolitan areas where we operate, and this increased competition may have a material adverse effect on our business, financial condition, results of operations and cash flows.

Unfavorable changes or conditions could occur in the states where our operations are concentrated.

A majority of our net patient service revenue in 2012 was generated by our operations in five states. In particular, Texas accounted for approximately 24% of our net patient service revenue in 2012. See Item 1. Business—“Geographic Coverage.” Adverse changes or conditions affecting these particular states, such as healthcare reforms, changes in laws and regulations, reduced Medicaid reimbursements and government investigations, economic conditions and natural disasters may have a material adverse effect on our business, financial condition, results of operations and cash flows.

We are dependent upon our key management personnel for our future success.

Our success depends to a significant extent on the continued contributions of our key management personnel, including our Chief Executive Officer, Roger J. Medel, M.D., for the management of our business and implementation of our business strategy. The loss of Dr. Medel or other key management personnel could have a material adverse effect on our business, financial condition, results of operations, cash flows and the trading price of our common stock.

Provisions of our articles and bylaws could deter takeover attempts.

Our Amended and Restated Articles of Incorporation authorize our board of directors to issue up to 1,000,000 shares of undesignated preferred stock and to determine the powers, preferences and rights of these shares without shareholder approval. This preferred stock could be issued with voting, liquidation, dividend and other rights superior to those of the holders of common stock. The issuance of preferred stock under some circumstances could have the effect of delaying, deferring or preventing a change in control. In addition, provisions in our amended and restated articles of incorporation and bylaws, including those relating to calling shareholder meetings, taking action by written consent and other matters, could render it more difficult or discourage an attempt to obtain control of MEDNAX through a proxy contest or consent solicitation. These provisions could limit the price that some investors might be willing to pay in the future for our shares of common stock.

None.

Our corporate office building, which we own, is located in Sunrise, Florida and contains 80,000 square feet of office space. We own an additional office building covering an additional 180,000 square feet for other administrative functions in Sunrise, Florida. We also lease space in hospitals and other facilities for our business and medical offices, and other needs. See Note 15 to the Consolidated Financial Statements in this Form 10-K, which is incorporated herein by reference. We believe that our facilities and the equipment used in our business are in good condition, in all material respects, and sufficient for our present needs.

The information required by this Item is included in and incorporated herein by reference to Item 1. Business of this Form 10-K under “Government Investigations” and “Other Legal Proceedings.”

Not applicable

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PART II

Price Range of Common Stock

Our common stock is traded on the New York Stock Exchange (the “NYSE”) under the symbol “MD.” The high and low sales prices for a share of our common stock for each quarter during our last two fiscal years are set forth below:

As of February 7, 2013, we had 271 holders of record of our common stock, and the closing sales price on that date for our common stock was $85.57 per share. We believe that the number of beneficial owners of our common stock is greater than the number of record holders because a significant number of shares of our common stock is held through brokerage firms in “street name.”

Dividend Policy

We did not declare or pay any cash dividends on our common stock in 2012 or 2011, nor do we currently intend to declare or pay any cash dividends in the future. The payment of any future dividends will be at the discretion of our Board of Directors and will depend upon, among other things, future earnings, results of operations, capital requirements, our general financial condition, general business conditions and contractual restrictions on payment of dividends, if any, as well as such other factors as our Board of Directors may deem relevant. Our revolving line of credit restricts our ability to declare and pay cash dividends. See Item 7. Management’s Discussion and Analysis of Financial Condition and Results of Operations—“Liquidity and Capital Resources.”

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Performance Graph

The following graph compares the cumulative total shareholder return on $100 invested on December 31, 2007 in our common stock against the cumulative total return of the S&P 500 Index, S&P 600 Health Care Index, and the NYSE Composite Index. The returns are calculated assuming reinvestment of dividends. The graph covers the period from December 31, 2007 through December 31, 2012. The stock price performance included in the graph is not necessarily indicative of future stock price performance.

The performance graph shall not be deemed incorporated by reference by any general statement incorporating by reference this annual report into any filing under the Securities Act of 1933 or the Securities Exchange Act of 1934, except to the extent that we specifically incorporate this information by reference, and shall not otherwise be deemed filed under such acts.

Issuer Purchases of Equity Securities

During the three months ended December 31, 2012, we did not repurchase any shares of our securities.

Recent Sales of Unregistered Securities

During the three months ended December 31, 2012, we did not sell any unregistered shares of our securities.

Equity Compensation Plans

Information regarding equity compensation plans is set forth in Item 12 of this Form 10-K and is incorporated herein by reference.

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The following table includes selected consolidated financial data set forth as of and for each of the five years in the period ended December 31, 2012. The balance sheet data at December 31, 2012 and 2011, and the income statement data for the years ended December 31, 2012, 2011 and 2010, have been derived from the Consolidated Financial Statements included in this Form 10-K. This selected financial data should be read in conjunction with “Management’s Discussion and Analysis of Financial Condition and Results of Operations,” and our Consolidated Financial Statements and the related notes included in Items 7 and 8, respectively, of this Form 10-K (in thousands, except per share and other operating data).

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The following discussion highlights the principal factors that have affected our financial condition and results of operations as well as our liquidity and capital resources for the periods described. This discussion should be read in conjunction with our Consolidated Financial Statements and the related notes included in Item 8 of this Form 10-K. This discussion contains forward-looking statements. Please see the explanatory note concerning “Forward-Looking Statements” preceding Part I of this Form 10-K and Item 1A. Risk Factors for a discussion of the uncertainties, risks and assumptions associated with these forward-looking statements. The operating results for the periods presented were not significantly affected by inflation.

OVERVIEW

MEDNAX is a leading provider of physician services including newborn, maternal-fetal, other pediatric subspecialties, and anesthesia care. At December 31, 2012, our national network was composed of more than 2,100 affiliated physicians, including more than 1,000 physicians who provide neonatal clinical care in 34 states and Puerto Rico, primarily within hospital-based neonatal intensive care units, to babies born prematurely or with medical complications. We have approximately 200 affiliated physicians who provide maternal-fetal and obstetrical medical care to expectant mothers experiencing complicated pregnancies primarily in areas where our affiliated neonatal physicians practice. Our network includes other pediatric subspecialists, including approximately 120 physicians providing pediatric cardiology care, 100 physicians providing pediatric intensive care, 60 physicians providing hospital-based pediatric care and 15 physicians providing pediatric surgical care. In addition, we have over 625 physicians who provide anesthesia care to patients in connection with surgical and other procedures as well as pain management.

During the year ended December 31, 2012, we completed the acquisition of 16 physician group practices. These acquisitions consisted of eight anesthesiology practices, two maternal-fetal medicine practices, two pediatric cardiology practices, one neonatal practice, and three other pediatric subspecialty practices. Based on our experience, we expect that we can improve the results of these practices through improved managed care contracting, improved collections, identification of growth initiatives, as well as, operating and cost savings based upon the significant infrastructure that we have developed.

With the acquisition of eight established practices, we continued the expansion of our anesthesia platform, bringing the number of anesthesia groups acquired since 2007 to 17. We also continued to focus on the integration of previously acquired practices and the ongoing development of the infrastructure to support those practices. Our national network of physicians and clinical professionals now includes over 625 anesthesiologists and approximately 850 advanced practice anesthetists who provide services in 17 metropolitan areas. We continue to believe that there are additional opportunities to apply our administrative expertise in this practice area, and we intend to pursue the acquisition of additional anesthesia practices in 2013.

In November 2012, we amended and restated our unsecured revolving credit facility (“Line of Credit”) to increase our borrowing capacity to $800 million from $500 million and to extend the maturity date to November 2017. The Line of Credit provides a funding source for future acquisitions, as well as other corporate purposes. The Line of Credit is guaranteed by substantially all of our subsidiaries and affiliated professional contractors and includes a $75 million sub-facility for the issuance of letters of credit and a $37.5 million sub-facility for swingline loans. In addition, the Line of Credit may be increased to $1.0 billion subject to the satisfaction of specified conditions.

The United States is continuing to be affected by unfavorable economic conditions and slow economic growth. The number of unemployed and under-employed workers remains significant. During the year ended December 31, 2012, the percentage of patient services being reimbursed under government-sponsored healthcare programs increased as compared to the year ended December 31, 2011. There could be additional shifts toward

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government-sponsored programs and patient volumes could decline if economic conditions do not improve or deteriorate further. Payments received from government-sponsored programs are substantially less for equivalent services than payments received from commercial insurance payors. In addition, many states are continuing to experience lower than anticipated revenue and are facing significant budget shortfalls. Although the shortfalls for the budget year beginning in July 2012 were lower than in recent years, they are still significant by historical standards. These shortfalls could lead to reduced or delayed funding for state Medicaid programs and, in turn, reduced or delayed reimbursement for physician services. See Item 1A. Risk Factors, in this Form 10-K for additional discussion on the general economic conditions in the United States and recent developments in the healthcare industry that could affect our business.

In March 2010, the “Patient Protection and Affordable Care Act,” (the “Affordable Care Act” formerly referred to as the “Healthcare Reform Act”), was enacted. The Affordable Care Act contains a number of provisions that could affect us over the next several years. These provisions include establishing health insurance exchanges to facilitate the purchase of qualified health plans, expanding Medicaid eligibility, subsidizing insurance premiums and creating requirements and incentives for businesses to provide healthcare benefits. Other provisions contain changes to healthcare fraud and abuse laws and expand the scope of the Federal False Claims Act. Additionally, in November 2012, the Centers for Medicare & Medicaid Services (“CMS”) adopted a rule under the Affordable Care Act that would allow physicians who provide eligible primary care services to generally be paid at the Medicare reimbursement rates in effect in calendar years 2013 and 2014 instead of state-established Medicaid reimbursement rates. Generally, state Medicaid reimbursement rates are lower than federally-established Medicare rates. State agencies are working toward submission of state plan amendments outlining how they will implement the rule, including frequency and timing of payments. The timing of these submissions varies by state. Upon submission, CMS will approve, disapprove or request additional information about the plans. There are still many unanswered questions regarding the attestation process that is required to qualify for the enhanced payments as well as whether certain services under state specific programs are eligible for the enhanced payments. Given the uncertainty surrounding the implementation process, eligibility of certain services under state specific programs and the timing and frequency of any payments, at this time we cannot predict with any assurance the ultimate impact of the rule on us. The rule also remains subject to continuing legislative scrutiny, including efforts by Congress to amend or repeal a number of its provisions.

The Affordable Care Act contains numerous other measures that could also affect us. For example, payment modifiers are to be developed that will differentiate payments to physicians under federal healthcare programs based on quality of care. In addition, other provisions authorize voluntary demonstration projects relating to the bundling of payments for episodes of hospital care and the sharing of cost savings achieved under the Medicare program.

Many of the Affordable Care Act’s most significant reforms, such as the establishment of state-based and federally facilitated insurance exchanges, do not take effect until 2014 and thereafter, and their details will be shaped significantly by implementing regulations that have yet to be finalized. In 2012, the U.S. Supreme Court heard challenges to the constitutionality of the Affordable Care Act’s individual mandate to purchase health insurance and to the viability of certain other provisions of the law. The Supreme Court issued a decision upholding most of the Affordable Care Act and determined that requiring individuals to maintain “minimum essential” health insurance coverage or pay a penalty to the Internal Revenue Service was within Congress’ constitutional taxing authority. However, the Supreme Court struck down a provision in the Affordable Care Act that penalized states that choose not to expand their Medicaid programs through an increase in the Medicaid eligibility income limit from a state’s current eligibility levels to 133% of the federal poverty limit. As a result of the Supreme Court’s ruling, it is unclear to what extent states will expand their Medicaid programs by raising the income limit to 133% of the federal poverty level and whether there will be more uninsured patients in 2014 than anticipated when the Affordable Care Act was enacted. All of the states in which we operate, however, already cover children in the first year of life and pregnant women if their household income is at or below 133% of the federal poverty level.

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Federal and state agencies are expected to continue to implement provisions of the Affordable Care Act and to develop regulations following the Supreme Court’s decision. However, given the complexity and the number of changes expected as a result of the Affordable Care Act, as well as the implementation timetable for many of them, we cannot predict the ultimate impacts of the Affordable Care Act as they may not be known for several years. The Affordable Care Act also remains subject to continuing legislative scrutiny, including efforts by Congress to amend or repeal a number of its provisions. As a result, we cannot predict with any assurance the ultimate effect of the Affordable Care Act on our Company, nor can we provide any assurance that its provisions will not have a material adverse effect on our business, financial condition, results of operations or cash flows.

Geographic Coverage

During 2012, 2011 and 2010, approximately 59%, 58% and 55%, respectively, of our net patient service revenue was generated by operations in our five largest states. During 2012, our five largest states consisted of Texas, North Carolina, Florida, Georgia and California. During 2011 and 2010, our five largest states consisted of Texas, North Carolina, Florida, Georgia, and Washington. During 2012, 2011 and 2010, our operations in Texas accounted for approximately 24%, 21% and 22%, respectively, of our net patient service revenue.

Payor Mix

We bill payors for professional services provided by our affiliated physicians to our patients based upon rates for specific services provided. Our billed charges are substantially the same for all parties in a particular geographic area regardless of the party responsible for paying the bill for our services. We determine our net patient service revenue based upon the difference between our gross fees for services and our estimated ultimate collections from payors. Net patient service revenue differs from gross fees due to (i) managed care payments at contracted rates, (ii) government-sponsored healthcare program reimbursements at government-established rates, (iii) various reimbursement plans and negotiated reimbursements from other third-parties, and (iv) discounted and uncollectible accounts of private-pay patients.

Our payor mix is composed of contracted managed care, government, principally Medicaid and Medicare, other third-parties and private-pay patients. We benefit from the fact that most of the medical services provided in the NICU are classified as emergency services, a category typically classified as a covered service by managed care payors.

The following is a summary of our payor mix, expressed as a percentage of net patient service revenue, exclusive of administrative fees, for the periods indicated:

The payor mix shown in the table above is not necessarily representative of the amount of services provided to patients covered under these plans. For example, the gross amount billed to patients covered under government programs for the years ended December 31, 2012, 2011 and 2010 represented approximately 55%, 54% and 54%, respectively, of our total gross patient service revenue. These percentages of gross revenue and the percentages of net revenue provided in the table above include the payor mix impact of acquisitions completed through December 31, 2012. On a same-unit basis, however, the gross amount billed to patients covered under government programs for the years ended December 31, 2012, 2011 and 2010 represented approximately 56%,

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55% and 55%, respectively, of our total gross patient service revenue. Same units are those units at which we provided services for the entire current period and the entire comparable period.

Quarterly Results

We have historically experienced and expect to continue to experience quarterly fluctuations in net patient service revenue and net income. These fluctuations are primarily due to the following factors:

We have significant fixed operating costs, including physician compensation, and, as a result, are highly dependent on patient volume and capacity utilization of our affiliated professional contractors to sustain profitability. Additionally, quarterly results may be affected by the timing of acquisitions and fluctuations in patient volume. As a result, the operating results for any quarter are not necessarily indicative of results for any future period or for the full year. Our unaudited quarterly results are presented in further detail in Note 16 to the Consolidated Financial Statements in this Form 10-K.

Application of Critical Accounting Policies and Estimates

The preparation of financial statements in conformity with accounting principles generally accepted in the United States (“GAAP”) requires estimates and assumptions that affect the reporting of assets, liabilities, revenue and expenses, and the disclosure of contingent assets and liabilities. Note 2 to our Consolidated Financial Statements provides a summary of our significant accounting policies, which are all in accordance with GAAP. Certain of our accounting policies are critical to understanding our Consolidated Financial Statements because their application requires management to make assumptions about future results and depends to a large extent on management’s judgment, because past results have fluctuated and are expected to continue to do so in the future.

We believe that the application of the accounting policies described in the following paragraphs is highly dependent on critical estimates and assumptions that are inherently uncertain and highly susceptible to change. For all of these policies, we caution that future events rarely develop exactly as estimated, and the best estimates routinely require adjustment. On an ongoing basis, we evaluate our estimates and assumptions, including those discussed below.

Revenue Recognition

We recognize patient service revenue at the time services are provided by our affiliated physicians. Almost all of our patient service revenue is reimbursed by government-sponsored healthcare programs and third-party insurance payors. Payments for services rendered to our patients are generally less than billed charges. We monitor our revenue and receivables from these sources and record an estimated contractual allowance to properly account for the anticipated differences between billed and reimbursed amounts. Accordingly, patient service revenue is presented net of an estimated provision for contractual adjustments and uncollectibles. Management estimates allowances for contractual adjustments and uncollectibles on accounts receivable based upon historical experience and other factors, including days sales outstanding (“DSO”) for accounts receivable,

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evaluation of expected adjustments and delinquency rates, past adjustments and collection experience in relation to amounts billed, an aging of accounts receivable, current contract and reimbursement terms, changes in payor mix and other relevant information. Contractual adjustments result from the difference between the physician rates for services performed and the reimbursements by government-sponsored healthcare programs and insurance companies for such services. The evaluation of these historical and other factors involves complex, subjective judgments. On a routine basis, we compare our cash collections to recorded net patient service revenue and evaluate our historical allowance for contractual adjustments and uncollectibles based upon the ultimate resolution of the accounts receivable balance. These procedures are completed regularly in order to monitor our process of establishing appropriate reserves for contractual adjustments. We have not recorded any material adjustments to prior period contractual adjustments and uncollectibles in the years ended December 31, 2012, 2011 or 2010.

DSO is one of the key factors that we use to evaluate the condition of our accounts receivable and the related allowances for contractual adjustments and uncollectibles. DSO reflects the timeliness of cash collections on billed revenue and the level of reserves on outstanding accounts receivable. Any significant change in our DSO results in additional analyses of outstanding accounts receivable and the associated reserves. We calculate our DSO using a three-month rolling average of net patient service revenue. Our net patient service revenue, net income and operating cash flows may be materially and adversely affected if actual adjustments and uncollectibles exceed management’s estimated provisions as a result of changes in these factors. As of December 31, 2012, our DSO was 48.4 days. We had approximately $873.0 million in gross accounts receivable outstanding at December 31, 2012, and considering this outstanding balance, based on our historical experience, a reasonably likely change of 0.5% to 1.5% in our estimated collection rate would result in an impact to net patient service revenue of approximately $4.4 million to $13.1 million. The impact of this change does not include adjustments that may be required as a result of audits, inquiries and investigations from government authorities and agencies and other third-party payors that may occur in the ordinary course of business. See Note 15 to our Consolidated Financial Statements in this Form 10-K.

Professional Liability Coverage

We maintain professional liability insurance policies with third-party insurers on a claims-made basis, subject to self-insured retention, exclusions and other restrictions. Our self-insured retention under our professional liability insurance program is maintained primarily through a wholly owned captive insurance subsidiary. We record liabilities for self-insured amounts and claims incurred but not reported based on an actuarial valuation using historical loss information, claim emergence patterns and various actuarial assumptions. Liabilities for claims incurred but not reported are not discounted. The average lag period from the date a claim is reported to the date it reaches final settlement is approximately three and one half years, although the facts and circumstances of individual claims could result in lag periods that vary from this average. Our actuarial assumptions incorporate multiple complex methodologies to determine the best liability estimate for claims incurred but not reported and the future development of known claims, including methodologies that focus on industry trends, paid loss development, reported loss development and industry-based expected pure premiums. The most significant assumptions used in the estimation process include the use of loss development factors to determine the future emergence of claim liabilities, the use of frequency and trend factors to estimate the impact of economic, judicial and social changes affecting claim costs, and assumptions regarding legal and other costs associated with the ultimate settlement of claims. The key assumptions used in our actuarial valuations are subject to constant adjustments as a result of changes in our actual loss history and the movement of projected emergence patterns as claims develop. We evaluate the need for professional liability insurance reserves in excess of amounts estimated in our actuarial valuations on a routine basis, and as of December 31, 2012, based on our historical experience, a reasonably likely change of 4.0% to 8.0% in our estimates would result in an increase or decrease to net income of approximately $1.9 million to $3.7 million. However, because many factors can affect historical and future loss patterns, the determination of an appropriate professional liability reserve involves complex, subjective judgment, and actual results may vary significantly from estimates.

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Goodwill

We record acquired assets, including identifiable intangible assets and liabilities at their respective fair values, recording to goodwill the excess of cost over the fair value of the net assets acquired. We test goodwill for impairment at a reporting unit level on an annual basis. The testing for impairment is completed using a two-step test. The first step compares the fair value of a reporting unit with its carrying amount, including goodwill. If the carrying amount of a reporting unit exceeds its fair value, a second step is performed to determine the amount of any impairment loss. We use income and market-based valuation approaches to determine the fair value of our reporting units. These approaches focus on discounted cash flows and market multiples based on our market capitalization to derive the fair value of a reporting unit. We also consider the economic outlook for the healthcare services industry and various other factors during the testing process, including hospital and physician contract changes, local market developments, changes in third-party payor payments, and other publicly available information.

Uncertain Tax Positions

We account for uncertainty in income taxes in accordance with the accounting guidance for uncertain tax positions. This guidance prescribes a recognition threshold and measurement attribute for financial statement recognition and measurement of a tax position taken or expected to be taken in a tax return. It also requires policy disclosures regarding penalties and interest and disclosures regarding increases and decreases in uncertain tax positions as a result of tax positions taken in a current or prior period, settlements with taxing authorities and any lapse of an applicable statute of limitations. Additional qualitative discussion is required for any tax position that may result in a significant increase or decrease in uncertain tax positions within a 12-month period from our reporting date. Accounting for uncertain tax positions under this guidance requires significant judgment and analyses as well as assumptions about future events. Future changes to our analyses and assumptions related to uncertain tax positions may have a material impact on our Consolidated Financial Statements.

Other Matters

Other significant accounting policies, not involving the same level of measurement uncertainties as those discussed above, are nevertheless important to an understanding of our Consolidated Financial Statements. For example, our Consolidated Financial Statements are presented on a consolidated basis with our affiliated professional contractors because we or one of our subsidiaries have entered into management agreements with our affiliated professional contractors meeting the “controlling financial interest” criteria set forth in accounting guidance for consolidations. Our management agreements are further described in Note 2 to our Consolidated Financial Statements in this Form 10-K. The policies described in Note 2 often require difficult judgments on complex matters that are often subject to multiple sources of authoritative guidance and are frequently reexamined by accounting standards setters and regulators. See “New Accounting Pronouncements” below for matters that may affect our accounting policies in the future.

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RESULTS OF OPERATIONS

The following table sets forth, for the periods indicated, certain information related to our operations expressed as a percentage of our net patient service revenue (patient billings net of contractual adjustments and uncollectibles, and including administrative fees):

Year Ended December 31, 2012 as Compared to Year Ended December 31, 2011

Our net patient service revenue increased $228.4 million, or 14.4%, to $1.82 billion for the year ended December 31, 2012, as compared to $1.59 billion for 2011. Of this $228.4 million increase, $179.0 million, or 78.4%, was attributable to revenue generated from acquisitions completed after December 31, 2010. Same-unit net patient service revenue increased $49.4 million, or 3.2%, for the year ended December 31, 2012. The change in same-unit net patient service revenue was the result of an increase of $29.9 million, or 1.9%, from higher overall patient service volumes and a net increase in revenue of approximately $19.5 million, or 1.3%, related to net reimbursement-related factors. The increase in revenue of $29.9 million from higher patient service volumes includes an increase of $24.2 million in neonatal and other services, including newborn nursery services and hearing screens and a net increase of $5.7 million from volume growth in our anesthesiology and maternal-fetal medicine services, partially offset by a decline in pediatric cardiology services. The net increase in revenue of $19.5 million related to reimbursement-related factors was primarily due to continued improvements in managed care contracting, an increase in the administrative fees received from our hospital partners due to the expansion of our services resulting from internal growth and the flow through of revenue from modest price increases, partially offset by a decrease in revenue caused by an increase in the percentage of our patients being enrolled in government-sponsored programs. Same units are those units at which we provided services for the entire current period and the entire comparable period.

Practice salaries and benefits increased by $160.5 million, or 16.5%, to $1.13 billion for the year ended December 31, 2012, as compared to $970.4 million for 2011. This $160.5 million increase was primarily attributable to increased costs associated with new physicians and other staff to support acquisition-related growth and growth at existing units, of which $121.9 million was related to salaries and $38.6 million was related to benefits and incentive compensation.

Practice supplies and other operating expenses increased $5.0 million, or 7.5%, to $71.8 million for the year ended December 31, 2012, as compared to $66.8 million for 2011. The increase was primarily attributable to practice supply, rent and other costs related to our acquisitions.

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General and administrative expenses include all billing and collection functions and all other salaries, benefits, supplies and operating expenses not specifically related to the day-to-day operations of our physician group practices. General and administrative expenses increased $23.1 million, or 13.6%, to $193.5 million for the year ended December 31, 2012, as compared to $170.4 million for 2011. This increase of $23.1 million is attributable to the overall growth of the Company including acquisition-related growth. General and administrative expenses as a percentage of net patient service revenue were 10.7% for the years ended December 31, 2012 and 2011, and grew at a rate slower than the rate of revenue growth.

Depreciation and amortization expense increased by $5.5 million, or 21.8%, to $30.8 million for the year ended December 31, 2012, as compared to $25.3 million for 2011. The increase was primarily attributable to the amortization of intangible assets related to acquisitions and the depreciation of fixed asset additions.

Income from operations increased $34.1 million, or 9.6%, to $389.5 million for the year ended December 31, 2012, as compared to $355.4 million for 2011. Our operating margin was 21.4% for the year ended December 31, 2012, as compared to 22.4% for 2011. This decrease of 94 basis points was primarily due to an increase in operating expenses during the year ended December 31, 2012 as compared to the year ended December 31, 2011, as well as the variability in margins due to the mix of practices acquired after December 31, 2010.

We recorded net interest expense of $1.3 million for the year ended December 31, 2012, as compared to $2.1 million for 2011. The decrease in net interest expense was primarily due to lower outstanding borrowings on our Line of Credit as well as a lower effective interest rate on borrowings under our Line of Credit, market value increases in the investments underlying our deferred compensation arrangements and an increase in interest income, partially offset by an increase in fees related to our Line of Credit. Interest expense for the years ended December 31, 2012 and 2011 consisted primarily of interest charges, commitment fees and amortized debt costs related to our Line of Credit and accretion expense related to our contingent consideration liabilities.

Our effective income tax rate was 37.9% for the year ended December 31, 2012, as compared to 38.3% for 2011.

Net income increased by 10.5% to $240.9 million for the year ended December 31, 2012, as compared to $218.0 million for 2011.

Diluted net income per common and common equivalent share was $4.85 on weighted average shares outstanding of 49.7 million for the year ended December 31, 2012, as compared to $4.47 on weighted average shares outstanding of 48.8 million for 2011. The increase of 0.9 million in our weighted average shares outstanding during 2012 is primarily due to the exercise of employee stock options, the vesting of restricted stock and the issuance of shares under our employee stock purchase plan (“Stock Purchase Plan.”)

Year Ended December 31, 2011 as Compared to Year Ended December 31, 2010

Our net patient service revenue increased $186.7 million, or 13.3%, to $1.59 billion for the year ended December 31, 2011, as compared to $1.40 billion for 2010. Of this $186.7 million increase, $140.1 million, or 75.0%, was attributable to revenue generated from acquisitions completed after December 31, 2009. Same-unit net patient service revenue increased $46.6 million, or 3.5%, for the year ended December 31, 2011. The change in same-unit net patient service revenue was the result of a net increase in revenue of approximately $32.7 million, or 2.5%, related to net reimbursement-related factors and an increase of $13.9 million, or 1.0%, from higher overall patient service volumes across our specialties. The net increase in revenue of $32.7 million related to reimbursement-related factors was primarily due to continued improvements in managed care contracting, an increase in the administrative fees received from our hospital partners due to the expansion of our services resulting from internal growth and the flow through of revenue from modest price increases. The increase in revenue of $13.9 million from higher patient service volumes includes an increase of $9.8 million

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from volume growth in our anesthesiology and pediatric cardiology services and an increase of $4.2 million in neonatal and other services, including hearing screens and newborn nursery services. Volume in our maternal-fetal medicine services was essentially flat. Same units are those units at which we provided services for the entire current period and the entire comparable period.

Practice salaries and benefits increased by $115.5 million, or 13.5%, to $970.4 million for the year ended December 31, 2011, as compared to $854.9 million for 2010. This $115.5 million increase was primarily attributable to increased costs associated with new physicians and other staff to support acquisition-related growth and growth at existing units, of which $83.2 million was related to salaries and $32.3 million was related to benefits and incentive compensation.

Practice supplies and other operating expenses increased $9.3 million, or 16.2%, to $66.8 million for the year ended December 31, 2011, as compared to $57.5 million for 2010. The increase was attributable to rent, practice supply and other costs of $5.9 million related to our acquisitions and increases in practice supplies and other costs of $3.4 million at our existing units.

General and administrative expenses include all billing and collection functions and all other salaries, benefits, supplies and operating expenses not specifically related to the day-to-day operations of our physician group practices. General and administrative expenses increased $16.1 million, or 10.4%, to $170.4 million for the year ended December 31, 2011, as compared to $154.3 million for 2010. This increase of $16.1 million is attributable to the overall growth of the Company, of which $5.9 million was attributable to acquisition-related growth. General and administrative expenses as a percentage of net patient service revenue decreased to 10.7% for the year ended December 31, 2011 from 11.0% for the year ended December 31, 2010 and grew at a rate slower than the rate of revenue growth.

Depreciation and amortization expense increased by $3.3 million, or 15.2%, to $25.3 million for the year ended December 31, 2011, as compared to $22.0 million for 2010. Depreciation expense for the year ended December 31, 2011 includes a $4.5 million increase attributable to the amortization of intangible assets related to acquisitions and the depreciation of fixed asset additions. Depreciation and amortization expense for the year ended December 31, 2010 included accelerated amortization of approximately $1.2 million related to the termination of a hospital contract associated with a prior acquisition.

Income from operations increased $42.5 million, or 13.6%, to $355.4 million for the year ended December 31, 2011, as compared to $312.9 million for 2010. Our operating margin was 22.4% for the year ended December 31, 2011, as compared to 22.3% for 2010.

We recorded net interest expense of $2.1 million for the year ended December 31, 2011, as compared to $1.8 million for 2010. The increase in net interest expense was primarily due to market value declines in the investments underlying our deferred compensation arrangements, an increase in fees related to our Line of Credit and accretion related to our contingent consideration liabilities, partially offset by a decrease in interest expense due to a lower effective interest rate on borrowings under our Line of Credit. Interest expense for the years ended December 31, 2011 and 2010 consisted primarily of interest charges, commitment fees and amortized debt costs related to our Line of Credit and accretion expense related to our contingent consideration liabilities.

Our effective income tax rate was 38.3% for the year ended December 31, 2011, as compared to 34.9% for 2010. Our effective income tax rate for 2010 reflects a $10.9 million reduction in our income tax provision during the third quarter of 2010 resulting from the resolution of certain matters that were under review with taxing authorities. Excluding the favorable impact of the tax matters resolution, our effective income tax rate was 38.4% for the year ended December 31, 2010. We believe that excluding the favorable impact from the tax matters resolution provides a more meaningful comparison of our effective income tax rate.

Net income increased by 7.6% to $218.0 million for the year ended December 31, 2011, as compared to $202.7 million for 2010. Our net income for 2010 includes a $10.9 million increase related to a reduction in our

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income tax provision resulting from the resolution of certain matters that were under review with taxing authorities. Excluding the favorable impact of the tax matters resolution, our net income of $218.0 million for the year ended December 31, 2011 increased by 13.7% as compared to $191.8 for the year ended December 31, 2010. We believe that excluding the favorable impact from the tax matters resolution provides a more meaningful comparison of our net income.

Diluted net income per common and common equivalent share was $4.47 on weighted average shares outstanding of 48.8 million for the year ended December 31, 2011, as compared to $4.26 on weighted average shares outstanding of 47.6 million for 2010. Diluted net income per common and common equivalent share for 2010 reflects a $10.9 million reduction in our income tax provision, or $0.23 per common and common equivalent share, resulting from the resolution of certain matters that were under review with taxing authorities. Excluding the favorable impact of the tax matters resolution, our diluted net income per common and common equivalent share was $4.03 for the year ended December 31, 2010. We believe that excluding the favorable impact from the tax matters resolution provides a more meaningful comparison of our diluted net income per common and common equivalent share. The increase of 1.2 million in our weighted average shares outstanding during 2011 is primarily due to the exercise of employee stock options, the vesting of restricted stock and the issuance of shares under our Stock Purchase Plan.

LIQUIDITY AND CAPITAL RESOURCES

As of December 31, 2012, we had $21.3 million of cash and cash equivalents on hand as compared to $18.6 million at December 31, 2011. Additionally, we had working capital of $90.7 million at December 31, 2012, an increase of $7.7 million from our working capital of $83.0 million at December 31, 2011. This net increase in working capital is primarily due to year-to-date earnings, net borrowings on our Line of Credit and proceeds from the issuance of common stock under our stock incentive and stock purchase plans, offset by the use of funds for practice acquisitions and contingent purchase price payments.

We generated cash flow from operating activities of $325.7 million, $271.0 million and $240.6 million for the years ended December 31, 2012, 2011 and 2010, respectively. The net increase in cash flow provided from operating activities for the year ended December 31, 2012, as compared to the year ended December 31, 2011, was primarily due to: (i) a net increase in cash flow related to our accounts receivable, primarily due to improved cash collections at our existing units and (ii) improved operating results.

During the year ended December 31, 2012, accounts receivable increased by $17.7 million, as compared to an increase of $49.0 million for 2011. The net change in the increase of accounts receivable is due to improvements in cash collections at existing units, partially offset by increases in accounts receivable related to recent acquisitions.

Our accounts receivable are principally due from managed care payors, government payors, and other third-party insurance payors. We track our collections from these sources, monitor the age of our accounts receivable, and make all reasonable efforts to collect outstanding accounts receivable through our systems, processes and personnel at our corporate and regional billing and collection offices. We use customary collection practices, including the use of outside collection agencies, for accounts receivable due from private pay patients when appropriate. Almost all of our accounts receivable adjustments consist of contractual adjustments due to the difference between gross amounts billed and the amounts allowed by our payors. Any amounts written off related to private pay patients are based on the specific facts and circumstances related to each individual patient account.

Days sales outstanding (“DSO”) is one of the key factors that we use to evaluate the condition of our accounts receivable and the related allowances for contractual adjustments and uncollectibles. DSO reflects the timeliness of cash collections on billed revenue and the level of reserves on outstanding accounts receivable. Our

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DSO was 48.4 days at December 31, 2012 as compared to 52.3 days at December 31, 2011. Our DSO improved by 3.9 days, primarily as a result of improvements in cash collections at existing units as well as the continued integration of our recent acquisitions. See Application of Critical Accounting Policies and Estimates—Revenue Recognition for more information on our DSO.

Our cash flow from operating activities is significantly affected by the payment of physician incentive compensation. A large majority of our affiliated physicians participate in our performance-based incentive compensation program and almost all of the payments due under the program are made annually in the first quarter. As a result, we typically experience negative cash flow from operations in the first quarter of each year and fund our operations during this period with cash on hand or funds borrowed under our Line of Credit. In addition, during the first quarter of each year, we use cash to make any discretionary matching contributions for participants in our qualified contributory savings plans.

Cash flow provided from operating activities for the year ended December 31, 2011 was affected by: (i) a net increase in cash flow from operations related to changes in the components of our accounts payable and accrued expenses, consisting primarily of changes in our accrued incentive compensation liability and changes in the current portion of our reserves for uncertain tax positions; and (ii) improved operating results; partially offset by (iii) a reduction in cash flow related to higher accounts receivable balances; and (iv) a net decrease in cash flow related to changes in our income tax liabilities, resulting primarily from higher estimated tax payments. Cash flow provided from operating activities for the year ended December 31, 2010 was affected by: (i) a net decrease in cash flow from operations related to changes in the components of our accounts payable and accrued expenses; and (ii) a reduction in cash flow from operations related to higher accounts receivable balances; partially offset by (iii) a net improvement in cash flow related to changes in our income tax liabilities, primarily due to the timing of our estimated quarterly tax payments; and (iv) improved operating results.

During the year ended December 31, 2012, our net cash used in investing activities of $460.5 million included physician practice acquisition payments and contingent consideration payments of $441.0 million, capital expenditures of $14.5 million and net purchases of $5.0 million related to the purchase and maturity of investments. Our acquisition payments were primarily related to the purchase of 16 physician practices, including eight anesthesiology practices, two maternal-fetal medicine practices, two pediatric cardiology practices, one neonatal practice, and three other pediatric subspecialty practices. Our capital expenditures were for medical equipment, computer and office equipment, software, leasehold and other improvements and furniture and fixtures at our office-based practices and our corporate and regional offices. Under the current accounting guidance for business combinations, payments of contingent consideration liabilities related to acquisitions completed prior to January 1, 2009 are presented as cash flows from investing activities. Payments of contingent consideration liabilities related to acquisitions completed after January 1, 2009 are presented as cash flows from financing activities.

During the year ended December 31, 2012, our net cash provided by financing activities of $137.5 million consisted primarily of net borrowings on our Line of Credit of $115.0 million, proceeds from the exercise of employee stock options and the issuance of common stock under our stock purchase plans of $28.8 million and excess tax benefits related to the exercise of employee stock options and the vesting of restricted stock of $6.5 million, partially offset by the payment of $10.2 million for contingent consideration liabilities and payments of $2.4 million for the amendment of our Line of Credit.

In November 2012, we amended and restated our Line of Credit which increased the borrowing capacity thereunder to $800 million from $500 million. The Line of Credit matures in November 2017.

The Line of Credit, which is guaranteed by substantially all of our subsidiaries and affiliated professional contractors, includes (1) a $75 million sub-facility for the issuance of letters of credit and (2) a $37.5 million sub-facility for swingline loans. The Line of Credit may be increased up to $1.0 billion, subject to the satisfaction of specified conditions. At our option, borrowings under the Line of Credit (other than swingline loans) bear interest at (1) the alternate base rate (defined as the highest of (i) the Wells Fargo Bank, National Association prime rate, (ii) the Federal Funds Rate plus 1/2 of 1.00% and (iii) one month LIBOR plus 1.00%) or (2) the LIBOR rate, as

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defined in the Line of Credit, plus an applicable margin rate ranging from 0.125% to 0.750% for alternate base rate borrowings and 1.125% to 1.750% for LIBOR rate borrowings, in each case based on our consolidated leverage ratio. Swingline loans bear interest at the alternate base rate plus the applicable margin rate. We are subject to certain covenants and restrictions specified in the Line of Credit, including covenants that require us to maintain a minimum fixed charge coverage ratio and not to exceed a specified consolidated leverage ratio, to comply with laws, and restrict us from paying dividends and making certain other distributions, as specified therein. Failure to comply with these covenants would constitute an event of default under the Line of Credit, notwithstanding our ability to meet our debt service obligations. The Line of Credit includes various customary remedies for the lenders following an event of default.

At December 31, 2012, we had an outstanding principal balance of $144.0 million on our Line of Credit. We also had outstanding letters of credit associated with our professional liability insurance program of $5.5 million which reduced the amount available on our Line of Credit to $650.5 million at December 31, 2012.

At December 31, 2012, we believe we were in compliance, in all material respects, with the financial covenants and other restrictions applicable to us under the Line of Credit. Based on our current expectations, we believe we will be in compliance with these covenants and other restrictions throughout 2013.

The exercise of employee stock options and the purchase of common stock by employees participating in our Stock Purchase Plan generated cash proceeds of $28.8 million, $31.4 million and $22.5 million for the years ended December 31, 2012, 2011 and 2010, respectively. Because stock option exercises and purchases under these plans are dependent on several factors, including the market price of our common stock, we cannot predict the timing and amount of any future proceeds.

We maintain professional liability insurance policies with third-party insurers, subject to self-insured retention, exclusions and other restrictions. We self-insure our liabilities to pay self-insured retention amounts under our professional liability insurance coverage through a wholly owned captive insurance subsidiary. We record liabilities for self-insured amounts and claims incurred but not reported based on an actuarial valuation using historical loss information, claim emergence patterns and various actuarial assumptions. Our total liability related to professional liability risks at December 31, 2012 was $137.0 million, of which $17.5 million is classified as a current liability within accounts payable and accrued expenses in the Consolidated Balance Sheet.

We anticipate that funds generated from operations, together with our current cash on hand and funds available under our Line of Credit, will be sufficient to finance our working capital requirements, fund anticipated acquisitions and capital expenditures, and meet our contractual obligations as described below for at least the next 12 months. During 2013, we plan to invest approximately $400 million in acquisitions, the majority of which we expect to invest within our anesthesiology specialty and the remainder in our neonatal, maternal-fetal, pediatric cardiology and other pediatric subspecialties.

CONTRACTUAL OBLIGATIONS

At December 31, 2012, we had certain obligations and commitments under our Line of Credit, capital leases and operating leases totaling approximately $241.1 million as follows (in thousands):

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Certain of our acquisition agreements contain contingent consideration provisions based on volume and other performance measures over an up to five-year period. Potential payments under these provisions are not contingent upon the future employment of the sellers. As of December 31, 2012, payments of up to $42.9 million may be due through 2017 under all contingent consideration provisions as follows (in thousands):

At December 31, 2012, our total liability for uncertain tax positions was $22.1 million, and is included within other liabilities on our Consolidated Balance Sheet. The timing and amount of future cash flows for each year beyond 2012 cannot be reasonably estimated. See Note 11 to our Consolidated Financial Statements in this Form 10-K for more information regarding our uncertain tax positions.

OFF-BALANCE SHEET ARRANGEMENTS

At December 31, 2012, we did not have any off-balance sheet arrangements that have or are reasonably likely to have a current or future effect on our financial condition, changes in financial condition, revenue or expenses, results of operations, liquidity, capital expenditures or capital resources.

NEW ACCOUNTING PRONOUNCEMENTS

In May 2011, the accounting guidance related to fair value measurements was amended. The amendment provides guidance and clarification about the application of existing fair value measurements and disclosure requirements. The amendment became effective on January 1, 2012. The adoption of this guidance did not have a material impact on our consolidated financial statements.

In September 2011, the accounting guidance related to goodwill impairment testing was amended to allow a company to first assess qualitative factors to determine whether performing the current two-step process is necessary. Under this option, the calculation of a reporting unit’s fair value is not required unless, as a result of the qualitative assessment, it is more likely than not that the fair value of the reporting unit is less than the unit’s carrying amount. The amendment became effective on January 1, 2012. The adoption of this guidance did not have an impact on our consolidated financial statements.

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Our Line of Credit is subject to market risk and interest rate changes. Our Line of Credit bears interest at (1) the alternate base rate, which is defined as the highest of (i) the Wells Fargo Bank, National Association prime rate, (ii) the Federal Funds Rate plus 1/2 of 1.000% and (iii) one month LIBOR plus 1.000% or (2) the LIBOR rate, as defined in the Line of Credit, plus, an applicable margin rate ranging from 0.125% to 0.750% for alternate base rate borrowings and 1.125% to 1.750% for LIBOR rate borrowings, in each case based on the Company’s consolidated leverage ratio. The outstanding principal balance on our Line of Credit was $144.0 million at December 31, 2012. Considering the total outstanding balance of $144.0 million, a 1% change in interest rates would result in an impact to income before taxes of approximately $1.4 million per year.

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The following Consolidated Financial Statements and Financial Statement Schedule of MEDNAX, Inc. and its subsidiaries are included in this Form 10-K on the pages set forth below:

INDEX TO FINANCIAL STATEMENTS

AND FINANCIAL STATEMENT SCHEDULE

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Report of Independent Registered Certified Public Accounting Firm

To the Board of Directors and Shareholders of

MEDNAX, Inc.:

In our opinion, the consolidated financial statements listed in the accompanying index present fairly, in all material respects, the financial position of MEDNAX, Inc. and its subsidiaries (the “Company”) at December 31, 2012 and 2011, and the results of their operations and their cash flows for each of the three years in the period ended December 31, 2012 in conformity with accounting principles generally accepted in the United States of America. In addition, in our opinion, the financial statement schedule listed in the accompanying index presents fairly, in all material respects, the information set forth therein when read in conjunction with the related consolidated financial statements. Also in our opinion, the Company maintained, in all material respects, effective internal control over financial reporting as of December 31, 2012, based on criteria established in Internal Control—Integrated Framework issued by the Committee of Sponsoring Organizations of the Treadway Commission (COSO). The Company’s management is responsible for these consolidated financial statements and financial statement schedule, for maintaining effective internal control over financial reporting and for its assessment of the effectiveness of internal control over financial reporting, included in Management’s Annual Report on Internal Control over Financial Reporting under Item 9A. Our responsibility is to express opinions on these consolidated financial statements, on the financial statement schedule, and on the Company’s internal control over financial reporting based on our integrated audits. We conducted our audits in accordance with the standards of the Public Company Accounting Oversight Board (United States). Those standards require that we plan and perform the audits to obtain reasonable assurance about whether the consolidated financial statements are free of material misstatement and whether effective internal control over financial reporting was maintained in all material respects. Our audits of the consolidated financial statements included examining, on a test basis, evidence supporting the amounts and disclosures in the consolidated financial statements, assessing the accounting principles used and significant estimates made by management, and evaluating the overall consolidated financial statement presentation. Our audit of internal control over financial reporting included obtaining an understanding of internal control over financial reporting, assessing the risk that a material weakness exists, and testing and evaluating the design and operating effectiveness of internal control based on the assessed risk. Our audits also included performing such other procedures as we considered necessary in the circumstances. We believe that our audits provide a reasonable basis for our opinions.

A company’s internal control over financial reporting is a process designed to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles. A company’s internal control over financial reporting includes those policies and procedures that (i) pertain to the maintenance of records that, in reasonable detail, accurately and fairly reflect the transactions and dispositions of the assets of the company; (ii) provide reasonable assurance that transactions are recorded as necessary to permit preparation of financial statements in accordance with generally accepted accounting principles, and that receipts and expenditures of the company are being made only in accordance with authorizations of management and directors of the company; and (iii) provide reasonable assurance regarding prevention or timely detection of unauthorized acquisition, use, or disposition of the company’s assets that could have a material effect on the financial statements.

Because of its inherent limitations, internal control over financial reporting may not prevent or detect misstatements. Also, projections of any evaluation of effectiveness to future periods are subject to the risk that controls may become inadequate because of changes in conditions, or that the degree of compliance with the policies or procedures may deteriorate.

/s/ PricewaterhouseCoopers LLP

Fort Lauderdale, Florida

February 15, 2013

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MEDNAX, INC.

CONSOLIDATED BALANCE SHEETS

(in thousands)