- What PP Actually Means
- Who Certifies It and Who Pursues It
- Exam Format: Two Components, One Score
- The 23 Content Domains
- Eligibility: What You Need Before You Apply
- Fees, Testing Sites, and Scheduling
- The Passing Standard and What the 2025 Numbers Show
- Keeping the Certificate Active
- Mapping a Study Plan to the Blueprint
- Frequently Asked Questions
- PP is the American Board of Pathology's subspecialty certification in Pediatric Pathology, not a generic "PP" credential.
- The 2026 exam has 235 total questions across a 170-item written/practical section and a 65-item digital virtual microscopy section.
- Total active testing time is 6 hours 23 minutes, inside an 8 hour 53 minute scheduled day at Pearson VUE centers.
- Passing requires a scaled score of 500, not a raw percentage cutoff.
What PP Actually Means
PP stands for Certification in Pathology: Pediatric Pathology, a subspecialty credential administered by the American Board of Pathology (ABPath). It is not a general pathology license and it is not the same as any other credential that happens to share the same two-letter acronym in other fields. This distinction matters because candidates researching "PP" online sometimes land on unrelated material. If you're building a study plan, start from the source: the official ABPath blueprint, exam schedule, and content specification, all of which are cited throughout this article and expanded on in our PP Exam Domains 2026: Complete Guide to All 23 Content Areas.
At its core, PP certification tells hiring committees and referring clinicians that a pathologist has demonstrated focused competency in the pathology of fetal, neonatal, and pediatric disease - spanning placental pathology through pediatric bone tumors - beyond what general anatomic pathology training covers.
Who Certifies It and Who Pursues It
ABPath is the sole certifying body for this subspecialty. Physicians typically pursue PP certification after completing an ACGME-accredited pediatric pathology fellowship, often while working in or targeting positions at children's hospitals, academic perinatal pathology services, and reference laboratories that handle placental and pediatric surgical specimens. If you're evaluating whether the credential fits your career trajectory, our breakdown in PP Jobs and the analysis in Is the PP Certification Worth It? Complete ROI Analysis 2026 go deeper into how the certification is used in practice.
Because the field is narrow, cohorts sitting for the exam each cycle are small compared to primary certification exams - a fact that shapes how the exam is scheduled and how pass-rate data should be interpreted (more on that below).
Exam Format: Two Components, One Score
The PP exam is entirely computer-based and administered in person at Pearson VUE Professional Centers - it is not remotely proctored from home. It is split into two distinct components that are scored and weighted separately before contributing to your overall result:
- Written/Practical section: 170 questions in 3 hours 8 minutes.
- Virtual microscopy section: 65 questions in 3 hours 15 minutes, using digital slide images rather than physical glass slides.
That totals 235 questions and 6 hours 23 minutes of active testing time, organized into six sections. Once you add instructions, a survey, and scheduled breaks, the full day at the test center runs 8 hours 53 minutes. Candidates should plan travel and rest around a nearly full-day commitment, not a quick morning appointment.
Key Takeaway
Because virtual microscopy uses digital slide navigation rather than glass slides, practice time should include getting comfortable panning, zooming, and switching magnification on-screen under time pressure - not just reviewing static images.
For a deeper walkthrough of what makes this exam format demanding - the six-section pacing, the split timing, and the cognitive load of switching between written and image-based reasoning - see How Hard Is the PP Exam? Complete Difficulty Guide 2026.
The 23 Content Domains
The official 2026 blueprint lists 23 shared content headings, but each one carries two separate approximate weightings: one for the Written/Practical component and one for Virtual Microscopy. These are not combined into a single whole-exam percentage - you should treat them as two parallel study maps, not one.
Domain 2: Perinatal Pathology - Fetal/Neonatal Pathophysiology
This is the single largest category in the Written/Practical component at 15%, making it the highest-yield content area to master for that half of the exam.
- Fetal and neonatal organ system pathophysiology
- Correlating placental findings with neonatal outcomes
Domains 1 and 2: The Perinatal Pair
Domain 1 (placental-maternal-fetal relationships) and Domain 2 (fetal/neonatal pathophysiology) both carry 10% in the Virtual Microscopy component - each perinatal category is weighted equally there, even though their Written/Practical weights differ (7% vs. 15%).
Beyond the perinatal core, the blueprint covers organ-system domains familiar to any surgical pathologist - Cardiovascular System, Respiratory System and Mediastinum, Central Nervous System, Skin, Special Senses, Alimentary Tract-GI, Hepatobiliary System and Pancreas, Kidney and Urinary System, Endocrine System, Hematopoietic System, Breast, Female and Male Reproductive Systems, Disorders of Sexual Development, Soft Tissue/Peripheral Nerve/Muscle, and the Skeletal System. It also includes practice-oriented domains: Diagnostic/Technical Procedures, Laboratory Management, Forensic Pathology, and Management & Informatics.
| Domain | Written/Practical % | Virtual Microscopy % |
|---|---|---|
| D2 Fetal/Neonatal Pathophysiology | 15% | 10% |
| D1 Placental-Maternal-Fetal Relationships | 7% | 10% |
| D13 Hematopoietic System | 6% | 9% |
| D9 Alimentary Tract-GI | 7% | 8% |
| D10 Hepatobiliary System and Pancreas | 6% | 8% |
| D20 Diagnostic/Technical Procedures | 7% | 2% |
| D21-D23 Management/Forensic/Informatics | 2% each | 0% |
Notice that Domains 21 through 23 (Laboratory Management, Forensic Pathology, and Management & Informatics) carry weight only in the Written/Practical component and 0% in Virtual Microscopy - those are pure knowledge-recall areas, not image-based questions. A full domain-by-domain breakdown, including all 23 headings and both weightings side by side, is available in PP Exam Domains 2026: Complete Guide to All 23 Content Areas.
Eligibility: What You Need Before You Apply
ABPath sets multiple prerequisites before you can register for the Pediatric Pathology exam:
- Primary certification in Anatomic Pathology/Clinical Pathology (AP/CP) or Anatomic Pathology (AP), or accepted Royal College of Physicians and Surgeons of Canada certification in Anatomic Pathology or General Pathology.
- 12 months of ACGME-accredited Pediatric Pathology fellowship training.
- Applicable medical education, licensure, and training-verification requirements set by ABPath.
These requirements mean the pathway to PP certification is sequential: primary board certification first, fellowship second, subspecialty exam application third. If you're mapping your own timeline, PP Requirements 2026: Eligibility, Prerequisites & How to Qualify walks through how these pieces fit together, and PP Training covers what a pediatric pathology fellowship year typically involves.
Fees, Testing Sites, and Scheduling
The 2026 initial application/examination fee for PP is USD 2,100. That figure includes a USD 200 nonrefundable administrative fee, which is charged regardless of whether you ultimately sit for the exam. There is no remote-proctoring option - testing happens exclusively at Pearson VUE Professional Centers, so candidates need to plan travel to an approved test site rather than assuming a take-home format.
For a full breakdown of what the fee covers and how it compares across the certification lifecycle, see PP Certification Cost 2026: Complete Pricing Breakdown. Exact testing windows and application deadlines are covered in PP Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
The Passing Standard and What the 2025 Numbers Show
PP uses a scaled score, and the passing standard is a scaled score of 500 - not a percentage of questions answered correctly. This is a meaningful distinction: two exams with different item difficulty in a given year are equated so that a 500 represents a consistent competency bar, rather than candidates needing to hit an arbitrary raw percentage.
In 2025, all 17 examinees passed, including all 13 first-time examinees, giving a reported pass rate of 100% in both categories. These figures come from a small cohort, which is typical for a narrow subspecialty exam - a single year's results shouldn't be read the same way you'd read pass-rate data from a high-volume primary board exam. For more context on how to interpret these numbers responsibly, read PP Pass Rate 2026: What the Data Shows and PP Passing Score 2026: Exactly What You Need to Pass.
Keeping the Certificate Active
Current ABPath certificates carry no fixed expiration date, but remaining in good standing is conditional on ongoing Continuing Certification participation. That includes:
- Biennial PATHway reporting.
- Maintaining professional standing and engaging in lifelong learning and practice improvement.
- The standard CME route: 70 qualifying credits per two-year reporting period, with at least 80% related to your scope of practice (approved training and research alternatives also exist).
- ABPath CertLink, a quarterly assessment requiring a cumulative performance of at least 60% over four years.
In short, earning the credential is the starting line, not the finish line - ongoing participation is built into how ABPath structures certification for the long term.
Mapping a Study Plan to the Blueprint
Generic study techniques - spaced repetition, timed practice blocks, active recall - work for any exam, but they only pay off when applied against PP's actual weighting. Given that Fetal/Neonatal Pathophysiology (Domain 2) is the single heaviest Written/Practical category at 15%, and that both perinatal domains carry 10% each in Virtual Microscopy, perinatal pathology deserves an early and recurring place in any study calendar rather than being treated as one topic among 23 equals.
Perinatal Core
- Placental-maternal-fetal relationships (Domain 1)
- Fetal/neonatal pathophysiology (Domain 2) - highest Written/Practical weight
High-Weight Organ Systems
- Hematopoietic System (Domain 13)
- Alimentary Tract-GI and Hepatobiliary/Pancreas (Domains 9-10)
Lower-Weight and VM-Only-Light Domains
- Laboratory Management, Forensic Pathology, Management & Informatics (Domains 21-23, weighted only in Written/Practical)
- Diagnostic/Technical Procedures with digital-slide practice
A detailed week-by-week plan, including how to balance written/practical review against virtual microscopy drills, is laid out in PP Study Guide 2026: How to Pass on Your First Attempt. If you want a condensed reference for final review, the PP Cheat Sheet 2026: One-Page Review of Must-Know Facts consolidates the domain weightings and exam-day logistics into one page. You can also run timed, domain-tagged practice questions on the main practice test platform to simulate the pacing of the 170-question and 65-question sections separately, which better reflects the actual exam structure than mixing all questions together.
Key Takeaway
Practice virtual microscopy questions in a timed block separate from written/practical questions - the two components have different pacing (roughly 1.1 minutes per written item vs. 3 minutes per virtual microscopy item) and mixing them during practice can distort your sense of readiness.
If your goal right now is simply orientation rather than deep preparation, our companion overview pieces - PP Certification, PP Meaning, and What Does PP Stand For? - cover the same core facts from different angles and can serve as quick refreshers before you dive into full-length practice exams on our site.
Frequently Asked Questions
Only in person. Testing takes place at Pearson VUE Professional Centers; there is no remote-proctoring option for the Pediatric Pathology subspecialty exam.
Digital virtual microscopy. The 65-question microscopy component uses on-screen digital slide images rather than a traditional glass-slide examination.
Active testing totals 6 hours 23 minutes across 235 questions, but the full scheduled day - including instructions, a survey, and breaks - runs 8 hours 53 minutes.
A scaled score of 500. This is not a raw percentage of correct answers; it reflects an equated standard across different exam administrations.
Generally no. Eligibility requires primary certification in AP/CP or AP (or accepted Royal College of Physicians and Surgeons of Canada equivalent), plus 12 months of ACGME-accredited Pediatric Pathology fellowship training.