What Is PP?

What Is PP, Exactly?

PP stands for the American Board of Pathology's initial subspecialty Certification in Pathology: Pediatric Pathology. It is not a standalone credential you can pursue straight out of residency; it sits on top of an existing primary certification in Anatomic Pathology and Clinical Pathology (AP/CP) or Anatomic Pathology (AP) alone, and it verifies that a pathologist has the specialized knowledge to evaluate fetal, neonatal, and pediatric tissue specimens across dozens of organ systems and disease categories.

If you have landed here after searching around terms like PP Meaning or What Does PP Stand For?, note that several unrelated credentials in other fields also use the "PP" abbreviation. On this site, and in this article, PP refers exclusively to the ABPath Pediatric Pathology subspecialty exam. Every fact discussed below comes directly from ABPath's own published materials for the 2026 exam cycle.

Who Administers PP and Who Can Sit for It

The American Board of Pathology (ABPath) owns and administers PP. Eligibility is built around a defined training pathway rather than open enrollment:

• Primary certification in AP/CP or AP through ABPath, or an accepted Royal College of Physicians and Surgeons of Canada certification in Anatomic Pathology or General Pathology.
• Completion of at least 12 months of ACGME-accredited Pediatric Pathology fellowship training.
• Satisfaction of ABPath's general medical education, licensure, and training-verification requirements that apply to all subspecialty candidates.

For a full breakdown of every prerequisite, documentation step, and timing consideration, see PP Requirements 2026: Eligibility, Prerequisites & How to Qualify. Because eligibility hinges on completed fellowship training rather than a simple application form, candidates should confirm their fellowship's accreditation status early rather than assuming it qualifies.

Exam Format and Structure

PP is delivered as a single-day, computer-based multiple-choice examination with two distinct components. Unlike some legacy pathology exams, PP does not include a glass-slide microscopy station - the microscopy content is delivered digitally.

In total, the 2026 schedule totals 235 questions across six sections, requiring 6 hours 23 minutes of active testing time. Including instructions, a candidate survey, and scheduled breaks, the full appointment runs 8 hours 53 minutes. Testing takes place in person at Pearson VUE Professional Centers - there is no remote or at-home proctoring option for PP.

For a deeper look at how the two components interact and how difficult candidates report the pacing to be, read How Hard Is the PP Exam? Complete Difficulty Guide 2026.

Registration, Fees, and Testing Logistics

The 2026 initial application/examination fee for PP is USD 2,100, which includes a USD 200 nonrefundable administrative fee. This fee structure means candidates who need to withdraw or reschedule should plan finances around losing that administrative portion regardless of outcome. A full cost breakdown, including how this compares to other pathology subspecialty pricing, is covered in PP Certification Cost 2026: Complete Pricing Breakdown.

Because testing occurs only at Pearson VUE Professional Centers, candidates need to factor in travel and seat availability when planning. Registration windows, application deadlines, and the annual testing calendar are detailed in PP Exam Dates 2026: Testing Windows, Deadlines & Scheduling - worth reviewing well before your fellowship year ends so you can align your application with your eligibility date.

The 23 Content Domains

PP's content blueprint is organized into 23 shared domain headings, but each domain carries two separate weightings - one for the Written/Practical component and one for Virtual Microscopy. These are reported as approximate percentages within each component, not as a single combined percentage of the whole exam. That distinction matters when you are deciding where to spend study time for each testing format.

The remaining 20 domains span cardiovascular, respiratory, CNS, skin, special senses, GI, hepatobiliary/pancreas, kidney, endocrine, breast, female and male reproductive systems, disorders of sexual development, soft tissue/nerve/muscle, skeletal, diagnostic/technical procedures, laboratory management, forensic pathology, and general management/informatics - each with its own distinct percentage split between the two components. Notably, Domains 21, 22, and 23 (laboratory management, forensic pathology, and management/informatics) carry weight only in the Written/Practical component and 0% in Virtual Microscopy, since these are policy- and process-oriented rather than slide-interpretation topics.

For the full percentage table across all 23 domains with study-order recommendations, see PP Exam Domains 2026: Complete Guide to All 23 Content Areas.

How PP Is Scored

PP uses a scaled score system rather than a raw percentage cutoff. To pass, a candidate must achieve a scaled score of 500. This approach normalizes difficulty across different exam forms and years, so "500" does not correspond to a fixed number of correct answers out of 235 - the exact conversion isn't published as a simple percentage. Candidates preparing for the exam should treat this as a target standard rather than try to reverse-engineer a raw-score threshold. A dedicated breakdown of how scaled scoring works and what it means for your study strategy is available at PP Passing Score 2026: Exactly What You Need to Pass.

What Recent Outcomes Look Like

In 2025, all 17 examinees who sat for PP passed, including all 13 first-time examinees - both reported pass rates were 100%. These figures come from a small cohort, which is typical for a subspecialty certification with a limited candidate pool each cycle, and small numbers mean year-to-year pass rate figures can swing based on just one or two examinees. For more context on how to interpret these figures responsibly (and why a 100% pass rate from a small group is not the same statistical signal as a 100% pass rate from hundreds of candidates), see PP Pass Rate 2026: What the Data Shows.

Keeping the Certificate Active

Passing PP does not produce a certificate with a fixed expiration date, but it is not a one-time event either. ABPath certificates remain conditional on ongoing Continuing Certification participation, which includes:

• Biennial PATHway reporting
• Maintaining professional standing
• Demonstrating lifelong learning and improvement in medical practice

The standard continuing medical education (CME) route requires 70 qualifying credits per two-year reporting period, with at least 80% of those credits related to your scope of practice. ABPath also recognizes approved training and research alternatives for pathologists whose work doesn't map neatly onto traditional CME activities.

Separately, ABPath CertLink offers a quarterly assessment format, requiring a cumulative performance of at least 60% averaged over a four-year cycle. This gives certified pathologists an ongoing, lower-stakes alternative to periodic high-stakes recertification exams.

Building a Domain-Aware Study Plan

Generic study techniques - spaced repetition, active recall, timed practice blocks - work for any exam, but they only pay off for PP if you sequence them against the actual domain weightings. Given that Fetal/Neonatal pathophysiology (Domain 2) carries the single highest Written/Practical weight at 15%, and perinatal domains overall carry 10% each in Virtual Microscopy, it makes sense to schedule early study weeks around placental and perinatal pathology before moving into lower-weighted organ-system domains.

For a structured, week-by-week version of this plan built specifically around all 23 domains, see PP Study Guide 2026: How to Pass on Your First Attempt. You can also run timed domain-specific drills on our practice test platform to get comfortable with the pacing before test day, and a condensed PP Cheat Sheet 2026: One-Page Review of Must-Know Facts is useful for last-week review.

Who Values PP Certification

PP certification signals to hiring institutions - children's hospitals, academic medical centers with pediatric pathology services, and reference laboratories handling perinatal and pediatric specimens - that a pathologist has verified subspecialty training beyond general AP/CP or AP certification. Because eligibility already requires completed fellowship training, the certification functions less as an entry credential and more as a formal confirmation of competency for pathologists already practicing in or transitioning into pediatric-focused roles.

If you're evaluating whether pursuing this credential fits your career trajectory, Is the PP Certification Worth It? Complete ROI Analysis 2026 weighs the fee, time investment, and continuing certification obligations against career positioning. For a broader look at where pediatric pathology roles tend to open up, see PP Jobs.

Frequently Asked Questions