What Does a Pediatrician Do

A pediatrician is a physician trained specifically to diagnose, treat, and prevent illness in patients from birth through late adolescence. This page covers the full operational scope of pediatric practice — from routine well-child care to the management of complex chronic conditions — and explains how the role is defined by medical education standards, federal regulatory frameworks, and clinical guidelines. Understanding what a pediatrician does clarifies when this type of physician is the appropriate point of care and when referral to a subspecialist is warranted.

Definition and Scope

A pediatrician holds a Doctor of Medicine (MD) or Doctor of Osteopathic Medicine (DO) degree, has completed a three-year residency in pediatrics accredited by the Accreditation Council for Graduate Medical Education (ACGME), and is board-certified through the American Board of Pediatrics (ABP). Board certification requires passage of a written examination and, for maintenance, periodic recertification assessments.

The defined patient population for general pediatrics spans birth through age 18, though the American Academy of Pediatrics (AAP) recommends that pediatric care may extend through age 21 in cases involving developmental disability or complex chronic illness. The pediatric age range is not arbitrary — physiological differences in organ maturation, pharmacokinetics, immune function, and growth velocity distinguish pediatric patients from adults in clinically significant ways.

Regulatory oversight of pediatric practice in the United States operates at both federal and state levels. State medical boards license physicians and define the scope of practice under state statute. At the federal level, the Centers for Medicare & Medicaid Services (CMS) administers the Early and Periodic Screening, Diagnostic, and Treatment (EPSDT) benefit under Medicaid, which mandates specific preventive services for enrolled patients under age 21 (42 CFR § 441.56). The regulatory context for pediatrics encompasses these federal mandates alongside state-level requirements for school entry vaccinations, newborn screening panels, and mandatory reporting of child abuse and neglect under the Child Abuse Prevention and Treatment Act (CAPTA).

How It Works

Pediatric clinical practice is structured around two overlapping functions: preventive care and acute or chronic illness management.

Preventive care follows a schedule defined by the AAP's Bright Futures guidelines, which the Health Resources and Services Administration (HRSA) has incorporated into the federal preventive services mandate. The Bright Futures periodicity schedule specifies 31 well-child visits from birth through age 21, with concentrated visit frequency in the first two years of life (7 visits between birth and 12 months). Each well-child visit includes:

1. Age-appropriate developmental and behavioral screening using validated instruments (e.g., the Ages and Stages Questionnaire, M-CHAT-R for autism risk)
2. Physical examination including growth measurement plotted against standardized growth charts published by the CDC
3. Administration or review of immunizations per the childhood vaccination schedule jointly published by the AAP, the Advisory Committee on Immunization Practices (ACIP), and the American Academy of Family Physicians (AAFP)
4. Anticipatory guidance covering nutrition, sleep, injury prevention, and behavioral health
5. Vision and hearing screening at designated intervals per AAP and United States Preventive Services Task Force (USPSTF) recommendations

Illness management encompasses diagnosis and treatment of acute conditions (infections, injuries, acute asthma episodes) and longitudinal management of chronic conditions such as asthma, type 1 diabetes, ADHD, and autism spectrum disorder. Chronic illness management typically involves coordinating care across subspecialists, schools, and behavioral health providers.

Common Scenarios

The conditions a general pediatrician manages span a wide clinical spectrum. The most frequent presentations in outpatient pediatric practice include:

• Acute respiratory illness: Ear infections, strep throat, croup and RSV, and asthma exacerbations collectively account for a substantial share of pediatric ambulatory visits. The CDC's National Ambulatory Medical Care Survey identifies acute respiratory conditions as the leading diagnostic category for pediatric office visits.
• Developmental and behavioral concerns: Pediatricians administer developmental screening tools and conduct initial evaluations for ADHD, autism spectrum disorder, and developmental delays.
• Chronic disease management: Conditions including childhood obesity, eczema, allergies, and type 1 diabetes require ongoing monitoring, medication management, and care coordination.
• Newborn and infant care: Newborn screening tests mandated under state law — with panels averaging 35 or more conditions per the Recommended Uniform Screening Panel (RUSP) maintained by HRSA — initiate a pediatrician's role in identifying metabolic and genetic disorders from the first days of life.

The pediatrician also serves as a primary resource for families navigating pediatric care on this site's index of topics, connecting clinical findings to referrals, community resources, and school-based accommodations.

Decision Boundaries

A general pediatrician manages the majority of childhood illness but operates within defined referral thresholds. The distinction between general pediatric management and subspecialty referral is guided by complexity, diagnostic uncertainty, and the need for procedural expertise not available in a primary care setting.

General pediatrician vs. pediatric subspecialist: A general pediatrician initiates workup and manages stable, well-characterized conditions. When a condition involves organ-specific complexity (e.g., pediatric cardiology for structural heart defects, pediatric endocrinology for poorly controlled type 1 diabetes), referral to a subspecialty is appropriate. The signs a child needs a specialist include failure to respond to first-line treatment, diagnostic uncertainty after initial workup, or conditions requiring procedures outside general practice scope.

General pediatrician vs. family medicine physician: A family medicine physician holds training in both pediatric and adult medicine but completes only a limited pediatric rotation within a three-year residency, compared to the full three-year pediatric residency required of a pediatrician. A detailed comparison of these roles is covered at pediatrician vs. family medicine.

Emergency thresholds: Certain presentations require emergency department evaluation rather than an office visit. These include respiratory distress, altered consciousness, high fever in infants under 60 days, and suspected sepsis. The clinical criteria for when to go to the ER with a child are defined by AAP clinical practice guidelines and documented in ACEP (American College of Emergency Physicians) triage standards.

Pediatricians also carry mandatory reporting obligations under CAPTA-implementing state statutes. All 50 states designate physicians as mandated reporters of suspected child abuse and neglect, and failure to report constitutes a misdemeanor or felony offense depending on state law.

References

• American Board of Pediatrics (ABP)
• American Academy of Pediatrics (AAP) — Bright Futures
• Accreditation Council for Graduate Medical Education (ACGME) — Pediatrics Program Requirements
• Health Resources and Services Administration (HRSA) — Bright Futures / Preventive Care
• Centers for Medicare & Medicaid Services — EPSDT: 42 CFR § 441.56
• HRSA — Recommended Uniform Screening Panel (RUSP)
• CDC — National Ambulatory Medical Care Survey
• Advisory Committee on Immunization Practices (ACIP) — CDC
• U.S. Department of Health and Human Services — Child Abuse Prevention and Treatment Act (CAPTA)

The law belongs to the people. Georgia v. Public.Resource.Org, 590 U.S. (2020)