FP Exam Domains 2026: Complete Guide to All 54 Content Areas

The American Board of Pathology's Certification in Pathology: Forensic Pathology (FP) examination is built from a content specification, not a vague topic list. The 2026 blueprint enumerates 54 named domains, each assigned an approximate percentage of the Written/Practical section and, separately, the Virtual Microscopy section. If you're preparing for this exam, understanding how those 54 rows translate into actual question counts is the difference between studying broadly and studying strategically. This guide walks through every domain, the weight it carries, and how to use that information when you build a study plan. For a narrower look at scoring mechanics, see our FP Passing Score 2026 guide, and for a full prep roadmap, check the FP Study Guide 2026.

Blueprint Overview: How the 54 Domains Are Structured

ABPath's January 2026 content specification organizes FP into 54 ordered domain rows. Unlike a single combined distribution, the official document publishes two separate weight columns: one for the Written/Practical section and one for the Virtual Microscopy section. This matters because a domain can be heavily tested in one format and barely tested - or not tested at all - in the other.

For example, Firearm Related Injuries carries a 10% Written/Practical weight but 0% Virtual Microscopy weight, meaning you won't see gunshot-wound slide images tested as a microscopy category, but you will see a large share of written scenario-based questions on ballistics, wound characteristics, and range-of-fire determination. Meanwhile, a domain like Blunt Trauma is heavily weighted in both formats.

Exam Format and How Domains Are Tested

The FP exam is a one-day, computer-based test administered at Pearson VUE Professional Testing Centers. It contains 275 single-best-answer multiple-choice questions split into two timed sections:

• Written/Practical: 225 questions in 3 hours 45 minutes
• Virtual Microscopy: 50 questions in 2 hours 56 minutes

Total testing time is 6 hours 41 minutes, with the full scheduled day running 9 hours 11 minutes once you account for the tutorial, survey, lunch, and other breaks. Virtual Microscopy questions use digital slide images rather than physical glass slides, and both sections may incorporate scene photographs, gross photographs, and radiographs alongside the core question stem - a format detail that matters when you're practicing with image-based question banks rather than text-only review.

The passing standard is a criterion-referenced scaled score of 500, not a fixed raw percentage correct - a distinction worth understanding fully before exam day. We break this down in more depth in FP Passing Score 2026: Exactly What You Need to Pass.

The Highest-Weighted Domains You Cannot Skip

Six domains account for a disproportionate share of the Written/Practical section. If your study time is limited, these deserve first priority:

Together, Domains 22 and 24 alone represent 18% of the Written/Practical weight and 10% of Virtual Microscopy - nearly a fifth of the entire written exam concentrated in two topic areas. Domains 51, 23, and 26 (Sharp Injuries, 3%) round out the traumatic-injury cluster that dominates the upper half of the weight table.

All 54 Domains, Grouped and Explained

Below is the complete list in the order specified by the ABPath content specification, organized loosely by clinical theme for easier study planning. Weights are given as Written/Practical % / Virtual Microscopy %.

Natural Disease and Organ Systems (Domains 1-19)

• D1 Natural Deaths - 0%/0% (framework category, not a standalone aggregate weight)
• D2 Pediatric Deaths - 1%/6%
• D3 Cardiovascular System - 3%/6%
• D4 Alcohol Use Disorder - 3%/4%
• D5 Central Nervous System - 2%/6%
• D6 Ocular System - 1%/2%
• D7 Respiratory System - 2%/8%
• D8 Head and Neck - 0%/2%
• D9 Genitourinary System - 1%/2%
• D10 Hematopoietic Lymphatic System - 1%/4%
• D11 Hepatic Gastrointestinal Pancreatic System - 1%/6%
• D12 Endocrine System - 1%/2%
• D13 Skin - 1%/2%
• D14 Bone, Joint, and Soft Tissue - 1%/2%
• D15 Peripheral Nerve and Skeletal Muscle - 0%/0%
• D16 Infectious Disease/Microbiology - 2%/8%
• D17 Immune Deficiency Disorders - 1%/2%
• D18 Nutritional Deficiencies - 1%/2%
• D19 Obesity - 1%/0%

Notice how Respiratory System and Infectious Disease/Microbiology each carry 8% Virtual Microscopy weight despite modest written weights of just 2%. This pattern repeats across organ-system domains - the microscopy section leans heavily on natural-disease slide recognition, while the written section shifts emphasis toward trauma and investigation.

Investigation and Injury Domains (Domains 20-34)

• D20 Medicolegal Investigation of Natural Deaths - 2%/0%
• D21 Mechanical & Physical Injury - 3%/2%
• D22 Blunt Trauma - 8%/10%
• D23 Asphyxia - 5%/0%
• D24 Firearm Related Injuries - 10%/0%
• D25 Bombs and Explosions - 1%/0%
• D26 Sharp Injuries (Cutting & Stabbing) - 3%/0%
• D27 Electrical and Lightning Injuries - 1%/2%
• D28 Anaphylaxis Related Deaths - 1%/2%
• D29 Venom Related Deaths - 1%/0%
• D30 Deaths due to Changes in Atmosphere - 1%/0%
• D31 Heat/Cold Exposure Deaths - 2%/4%
• D32 Fire/Thermal Deaths - 2%/4%
• D33 Radiation Injuries & Deaths - 1%/0%
• D34 Chemical Injury (Toxicology & Postmortem Chemistry) - 3%/2%

This cluster represents the traumatic and environmental death core of forensic practice. Combined, Domains 21 through 34 make up a substantial share of total Written/Practical weight - this is where scene reconstruction, injury pattern interpretation, and cause-of-death determination knowledge gets tested most directly.

Toxicology, Identification, and Special Circumstances (Domains 35-54)

• D35 Analytic Methods - 1%/0%
• D36 Interpretative: Autopsy & Chemical - 2%/0%
• D37 Environmental and Industrial Toxicology - 1%/0%
• D38 Identification of Human Remains - 2%/0%
• D39 Unnatural Deaths in Childhood - 2%/2%
• D40 Elder Abuse - 1%/0%
• D41 Pregnancy Related Deaths - 1%/4%
• D42 Sex-Related Deaths - 1%/0%
• D43 Deaths from Complications of Diagnostic and Therapeutic Procedures - 2%/4%
• D44 Water-Related Deaths - 2%/0%
• D45 Psychiatric and Stress Related Deaths - 1%/0%
• D46 History and Development of Forensic Pathology & Legal Medicine - 1%/0%
• D47 Jurisprudence and Certification of Death - 2%/0%
• D48 Criminalistics - 1%/0%
• D49 Bioterrorism and Chemical Agents - 1%/0%
• D50 Molecular Pathology - 1%/0%
• D51 Transportation Related Deaths - 5%/0%
• D52 In-custody Deaths - 2%/0%
• D53 Postmortem Radiography - 2%/0%
• D54 Select Topics/Management - 1%/0%

This final block covers the medicolegal, administrative, and specialized-circumstance content that rounds out forensic practice - from jurisprudence and death certification to in-custody deaths and postmortem imaging. Most of these carry 0% Virtual Microscopy weight, meaning they're tested almost exclusively through written scenario questions.

Domains With 0% Direct Weight - Why They're Still Listed

Three domains - Natural Deaths (D1), Peripheral Nerve and Skeletal Muscle (D15), and several others with 0% in one column - show no listed percentage in a given section. This does not mean the topic is untested. ABPath's content specification notes that the Natural Deaths row functions as a category header rather than an aggregate weight for the separately-weighted organ-system domains that follow it (D2 through D19). In practice, natural disease content is distributed across those individually weighted rows rather than tested as one lump category.

Mapping Domains to a Study Timeline

Rather than studying all 54 domains with equal intensity, allocate time roughly proportional to combined Written/Practical and Virtual Microscopy weight, while still touching every domain at least once before test day.

For a more detailed week-by-week plan and question-bank strategy, see the FP Study Guide 2026: How to Pass on Your First Attempt. If you want a condensed reference you can review the night before, the FP Cheat Sheet 2026 compiles must-know facts across all 54 domains in one page.

Who Sits for FP and Why Domain Coverage Matters

Eligibility for the FP exam requires AP/CP or AP primary certification plus 12 months of ACGME-accredited Forensic Pathology fellowship training, along with a qualifying medical degree, training verification, and a full unrestricted medical license for certification. Because candidates come to the exam having already completed general pathology certification, the FP blueprint assumes strong baseline organ-system knowledge and focuses its heaviest weight on forensic-specific content: trauma mechanisms, death investigation, toxicology interpretation, and jurisprudence - the areas that distinguish forensic pathologists from general or anatomic pathologists. Full eligibility details are covered in our FP Requirements 2026 guide.

The 2026 exam fee is $2,100, which includes a $200 nonrefundable administrative fee, with testing occurring at Pearson VUE centers during the September 8-28, 2026 window. If you're budgeting for the full path to certification, our FP Certification Cost 2026 breakdown and FP Exam Dates 2026 guide cover the registration mechanics in detail. Understanding domain weighting also helps candidates evaluate difficulty realistically - for a broader difficulty discussion, see How Hard Is the FP Exam? Complete Difficulty Guide 2026, and for outcomes data, FP Pass Rate 2026: What the Data Shows.

Domain mastery is also relevant beyond exam day. Employers hiring forensic pathologists - medical examiner offices, coroner systems, academic forensic programs - expect competency across the full breadth of this blueprint, not just the highest-weighted rows. If you're weighing whether the credential aligns with your career goals, see Is the FP Certification Worth It? Complete ROI Analysis 2026 and FP Jobs for how domain expertise translates into practice. You can also build hands-on familiarity with the question style by working through practice material on our main practice test platform before scheduling your exam.

Because CertLink and the ongoing continuing certification cycle also draw on this same content universe - requiring 70 CME credits per two-year cycle and cumulative performance tracking - the domain familiarity you build now carries forward well past initial certification. Reviewing practice questions organized by domain is one of the most efficient ways to confirm which of the 54 areas need more attention before you finalize your study schedule.

Frequently Asked Questions