- What the 13 PHM Domains Represent
- The Full Domain List and Weights
- Domain 1: Medical Conditions (55%)
- Domains 2-4: Behavioral Health, Newborn Care, Medical Complexity
- Domains 5-7: Procedures, Family-Centered Care, Transitions
- Domains 8-9: Quality Improvement and High-Value Care
- Domains 10-13: Advocacy, Ethics, Teaching, and Scholarly Activity
- How the Domains Show Up on Exam Day
- Building a Domain-Weighted Study Schedule
- Frequently Asked Questions
- The ABP PHM Content Outline lists exactly 13 top-level domains that total 100%.
- Medical Conditions alone accounts for 55% of the exam - more than the other 12 domains combined.
- Behavioral and Mental Health Conditions carries 6% weight, tied with Children with Medical Complexity.
- The exam runs two 2-hour-15-minute sections (4.5 hours of testing) with an optional 30-minute break.
What the 13 PHM Domains Represent
Certification in Pediatric Hospital Medicine (PHM) is administered by the American Board of Pediatrics (ABP) as a subspecialty certification, separate from general pediatrics certification and separate from MOCA-Peds. Everything tested on the initial certification exam maps back to the ABP Pediatric Hospital Medicine Content Outline, which organizes the entire body of knowledge into 13 ordered domains. Each domain carries a fixed percentage of the exam, and together they sum to 100%.
Understanding these domains is not busywork - it is the single most efficient way to allocate study time. A candidate who spends equal hours on all 13 domains is misallocating effort, because the domains are wildly uneven in weight. This guide walks through every domain in the order the ABP lists them, explains what falls inside each one, and shows how to translate the outline into an actual study plan. For a broader walkthrough of exam preparation strategy, see the PHM Study Guide 2026.
The Full Domain List and Weights
Here is the complete, ordered list of the 13 domains as they appear in the ABP Pediatric Hospital Medicine Content Outline. Note that Medical Conditions has internal organ-system subdivisions (cardiology, pulmonology, infectious disease, and so on), but those subdivisions are nested topics inside Domain 1 - they are not separate top-level domains.
| Domain | Weight |
|---|---|
| 1. Medical Conditions | 55% |
| 2. Behavioral and Mental Health Conditions | 6% |
| 3. Newborn Care | 8% |
| 4. Children with Medical Complexity | 6% |
| 5. Medical Procedures | 3% |
| 6. Patient- and Family-Centered Care | 2% |
| 7. Transitions of Care | 2% |
| 8. Quality Improvement, Patient Safety, and Systems-Based Improvement | 4% |
| 9. Evidence-Based High-Value Care | 5% |
| 10. Advocacy and Leadership | 2% |
| 11. Ethics, Legal Issues, and Human Rights | 2% |
| 12. Teaching and Education | 2% |
| 13. Core Knowledge in Scholarly Activities | 3% |
If you want the entire outline condensed into a single reference sheet for last-minute review, the PHM Cheat Sheet 2026 collapses these percentages and high-yield topics into one page.
Domain 1: Medical Conditions (55%)
Medical Conditions - 55%
This single domain is worth more than half the exam, and it is organized by organ system rather than as one undifferentiated topic list. Candidates should expect questions spanning respiratory illness, infectious disease, gastrointestinal and hepatic conditions, cardiology, neurology, endocrine and metabolic disorders, renal and genitourinary issues, hematology-oncology, musculoskeletal conditions, and dermatologic presentations as they appear in the inpatient hospital setting.
- Focus on inpatient presentation, diagnostic workup, and management - not outpatient primary care management
- Expect scenario-based vignettes requiring recognition of complications, not just diagnosis
- Common conditions (bronchiolitis, pneumonia, asthma exacerbations, febrile infants, dehydration) are tested more deeply than rare zebras
Because Medical Conditions is more than half the exam, it should consume roughly half of your total study calendar. Candidates frequently underestimate how much of this domain is scenario-based reasoning rather than pure recall - the exam rewards clinical judgment about escalation, discharge readiness, and complication recognition, not memorized fact lists. This is also the domain most responsible for perceived exam difficulty; if you're wondering how demanding the test really is, the breakdown in How Hard Is the PHM Exam? Complete Difficulty Guide 2026 is directly tied to how this domain is weighted and tested.
Domains 2-4: Behavioral Health, Newborn Care, Medical Complexity
Domain 2: Behavioral and Mental Health Conditions - 6%
Covers recognition and inpatient management of mental health presentations that hospitalists encounter on the wards, including agitation, suicidality screening in medically admitted patients, and coordination with psychiatric services.
- Emphasis on the hospitalist's role rather than psychiatric specialist management
- Safety planning and disposition decisions are commonly tested
Domain 3: Newborn Care - 8%
Larger than several other domains combined, this section covers well-newborn management, hyperbilirubinemia, feeding issues, and the transition of care for infants requiring hospital-level attention short of NICU-level intensity.
- Know discharge readiness criteria and screening requirements
- Understand escalation thresholds to neonatology
Domain 4: Children with Medical Complexity - 6%
Tests management of technology-dependent and multi-system children, including care coordination, device-related complications, and communication across specialists and caregivers.
- Focus on the hospitalist's coordinating role, not device-specific technical mastery
- Family and caregiver communication is frequently embedded in vignettes
Domains 5-7: Procedures, Family-Centered Care, Transitions
Domain 5: Medical Procedures - 3%
Covers indications, contraindications, and complications of common inpatient pediatric procedures rather than hands-on technique.
Domain 6: Patient- and Family-Centered Care - 2%
Tests communication with families, shared decision-making, and family-centered rounding principles specific to hospital medicine.
Domain 7: Transitions of Care - 2%
Covers safe handoffs between shifts, services, and care settings, including discharge planning and communication with primary care and subspecialty providers.
These three domains combine for only 7% of the exam, but they are easy to underprepare for because they feel "soft" compared to Medical Conditions. Don't skip them entirely - a handful of missed points here can matter when the passing standard is a fixed scaled score.
Domains 8-9: Quality Improvement and High-Value Care
Domain 8: Quality Improvement, Patient Safety, and Systems-Based Improvement - 4%
Tests familiarity with QI methodology, patient safety event reporting, and systems-level thinking as applied to the hospital environment - concepts pediatric hospitalists are expected to lead, not just participate in.
- Know basic QI frameworks (PDSA cycles, root cause analysis concepts)
- Understand how systems failures contribute to patient harm
Domain 9: Evidence-Based High-Value Care - 5%
Covers avoiding low-value testing and treatment, applying evidence to reduce unnecessary interventions, and understanding cost-conscious clinical decision-making in the inpatient setting.
- Expect questions asking which test or treatment is unnecessary given a presented scenario
- Choosing Wisely-style reasoning is directly relevant
Domains 10-13: Advocacy, Ethics, Teaching, and Scholarly Activity
Domain 10: Advocacy and Leadership - 2%
Tests understanding of the hospitalist's role in institutional and community advocacy for child health.
Domain 11: Ethics, Legal Issues, and Human Rights - 2%
Covers informed consent, confidentiality, mandatory reporting, and ethical dilemmas specific to hospitalized children and their families.
Domain 12: Teaching and Education - 2%
Tests principles of bedside teaching and education of trainees and families in the hospital setting.
Domain 13: Core Knowledge in Scholarly Activities - 3%
Covers basic research methodology, study design interpretation, and statistics as applied to reading and evaluating the pediatric hospital medicine literature.
Together, Domains 10 through 13 make up only 9% of the exam, but they reflect the non-clinical competencies the ABP expects from certified pediatric hospitalists - leadership, ethical reasoning, teaching, and scholarly literacy alongside clinical skill.
Key Takeaway
Rank your study hours to match domain weight: Medical Conditions first and heaviest, then Newborn Care, Behavioral Health, and Children with Medical Complexity, then the remaining nine domains grouped together for a final pass.
How the Domains Show Up on Exam Day
The PHM initial certification exam is a computer-based, multiple-choice examination delivered at Prometric testing centers. The ABP subspecialty schedule structures the test as two sections of 2 hours and 15 minutes each, for a total of 4 hours and 30 minutes of active testing time. Candidates get an optional break of up to 30 minutes between sections, plus additional administrative time for check-in and instructions.
Questions from all 13 domains are distributed across both sections - the domains are not siloed into separate blocks you can predict in advance. This means Medical Conditions questions, Newborn Care questions, and Ethics questions can all appear within the same section, so you need working knowledge across the outline rather than the ability to "peak" for one section.
Passing is determined by a scaled score of 180 on the ABP's 1-to-300 scoring scale, not a raw percentage of questions answered correctly. For a full explanation of how scaled scoring works and what it means for how many questions you can miss, see PHM Passing Score 2026: Exactly What You Need to Pass. If you want the aggregate outcome data candidates have reported, PHM Pass Rate 2026: What the Data Shows covers that separately.
Building a Domain-Weighted Study Schedule
A domain-weighted schedule beats a generic "study everything equally" template because it mirrors how the exam is actually built. Below is a sample approach that allocates time proportionally, front-loading Medical Conditions and grouping the smaller domains together near the end for integration and review.
Medical Conditions by Organ System
- Work through respiratory, infectious disease, GI, and cardiology inpatient presentations
- Use case-based question sets to practice escalation and discharge-readiness reasoning
Remaining Medical Conditions + Newborn Care
- Cover neurology, endocrine, renal, heme-onc, and dermatologic conditions
- Layer in well-newborn management and hyperbilirubinemia thresholds
Behavioral Health & Medical Complexity
- Review inpatient mental health screening and disposition
- Study care coordination for technology-dependent children
The Nine Smaller Domains
- Group Procedures, Family-Centered Care, Transitions, QI/Safety, High-Value Care, Advocacy, Ethics, Teaching, and Scholarly Activity together
- These total under 30% combined but touch on distinct concepts - a single focused week plus spaced review is usually enough
Full-Domain Practice and Review
- Take timed practice sets spanning all 13 domains to simulate the mixed-domain structure of real sections
- Revisit missed questions and cross-reference back to the specific domain
This is only a sample cadence - adjust based on your own baseline knowledge and clinical experience. You can pressure-test your readiness against realistic, domain-tagged questions on our PHM practice test platform, which lets you see performance broken down by domain rather than just an overall score.
A Note on Eligibility Before You Plan Your Domains
Before investing months in a domain-by-domain study plan, confirm you're eligible to sit for the exam. The standard pathway requires general pediatrics certification, completion of a two-year ABP-accredited Pediatric Hospital Medicine fellowship, satisfactory clinical and scholarly-activity evaluations, and compliance with ABP licensure and professional-standing requirements. The practice-pathway application window closed April 30, 2024, and beginning in 2026 new applicants must complete the fellowship route rather than apply through practice alone. Full detail on who qualifies and how is covered in PHM Requirements 2026: Eligibility, Prerequisites & How to Qualify, and cost mechanics are broken down in PHM Certification Cost 2026: Complete Pricing Breakdown.
It's also worth distinguishing initial certification from ongoing maintenance. Continuing certification for PHM diplomates includes professional standing, self-assessment, knowledge assessment, and quality improvement components, with 50 ABP MOC Part 2 self-assessment points required per five-year cycle. Initial certification and MOCA-Peds are separate assessments with separate purposes - this article and the domain outline above apply specifically to initial certification. If you're still getting oriented to what the credential involves at a foundational level, What Is PHM Certification? is a good starting point, and Is the PHM Certification Worth It? Complete ROI Analysis 2026 covers the broader career case.
Frequently Asked Questions
There are 13 top-level domains in the ABP Pediatric Hospital Medicine Content Outline, ranging from Medical Conditions at 55% down to several domains at 2% each, together totaling 100%.
Start with Medical Conditions since it represents 55% of the exam. Build a broad base across organ systems before moving to Newborn Care, Behavioral and Mental Health Conditions, and Children with Medical Complexity.
No. Organ-system subdivisions such as cardiology, pulmonology, and infectious disease are nested topics within Domain 1, not additional top-level domains. The outline has exactly 13 top-level domains.
The exam consists of two 2-hour-15-minute sections (4.5 hours of total testing time) at Prometric centers. Questions from all 13 domains are mixed throughout both sections rather than grouped by domain.
Yes. The practice-pathway option ended April 30, 2024. Starting in 2026, new applicants must complete a two-year ABP-accredited Pediatric Hospital Medicine fellowship along with general pediatrics certification and satisfactory evaluations.