- Basic science carries 30% of the exam - the single largest domain by far.
- 250 questions across four 90-minute sections total 6 hours 50 minutes with breaks.
- Passing is a scaled score of 500 (200-800 scale), not a fixed percent-correct cutoff.
- Initial exam costs $1,700; a retake costs $1,400 if a first attempt falls short.
What This Certification Actually Tests
The Certification in Adult & Pediatric Allergy & Immunology Subspecialty is administered by the American Osteopathic Conjoint Examination Committee on Pediatric and Adult Allergy and Immunology, under the American Osteopathic Association. Within the certification program this is referred to using the acronym PAAI. This guide covers the initial subspecialty certification exam - the credentialing step that follows fellowship - and does not cover the separate Osteopathic Continuous Certification (OCC) longitudinal assessment that diplomates complete after they're already certified.
If you landed here trying to understand the credential itself before diving into study logistics, it's worth first reading What Is Adult & Pediatric Allergy & Immunology? and Adult & Pediatric Allergy & Immunology Meaning for context, or Adult & Pediatric Allergy & Immunology Certification for a full overview of the credentialing pathway.
Exam Format, Timing, and Delivery
The initial exam is built from 250 multiple-choice questions, split into four 90-minute sections containing 63, 62, 63, and 62 questions respectively. Scheduled breaks run 10 minutes, then 30 minutes, then 10 minutes, adding up to 50 minutes of break time layered on top of six hours of active answering time. That's why the total appointment window is listed as 6 hours and 50 minutes.
Delivery is entirely remote-proctored through MonitorEDU, running on the PARADIGM examination platform. There is no test-center option baked into this program's standard workflow - candidates test from a private space of their own choosing, provided it meets the technical and environmental requirements described below.
Key Takeaway
Treat the four 90-minute blocks as four separate mini-exams. Pace yourself section by section rather than trying to bank time across the whole 6-hour-50-minute session - the break structure resets your mental clock at fixed points regardless of how you distribute effort earlier.
The Eight Content Domains
The initial exam blueprint is organized into eight content areas that sum to 100% of the exam. Understanding the weighting is the single highest-leverage thing you can do before opening a study resource - it tells you exactly where your hours should go. For a deeper breakdown of each area with sample topic lists, see the Adult & Pediatric Allergy & Immunology Exam Domains 2026 guide.
Domain 1: Basic Science (30%)
This is by far the heaviest domain and should anchor your entire study plan. It covers the immunologic and physiologic foundations that the other seven domains build on.
- Immune cell biology, signaling pathways, and cytokine networks
- Mechanisms underlying hypersensitivity and tolerance
- Genetics and molecular pathways relevant to immune dysfunction
Domain 2: Primary and Secondary Immunodeficiencies (10%)
Expect questions on recognition patterns, laboratory workup logic, and distinguishing primary from secondary etiologies across age groups.
Domain 3: GI Disorders (10%)
Focuses on the immunologic and allergic presentations of gastrointestinal disease, including how they overlap with systemic hypersensitivity.
Domain 4: Autoimmunity and Other Immunological Disorders (3%)
The smallest domain by weight, but still testable - don't skip it entirely just because it's compact.
Domain 5: Pulmonary Diseases (13%)
Asthma phenotyping, airway inflammation, and pulmonary manifestations of immune disease are core here.
Domain 6: Hypersensitivity Reactions and Mast Cell Disorders (11%)
Covers drug reactions, anaphylaxis mechanisms, and mast cell activation syndromes - an area that rewards precise mechanistic recall.
Domain 7: Allergic and Non-Allergic Upper Respiratory Tract Diseases (13%)
Rhinitis, sinusitis, and related upper airway conditions across both pediatric and adult presentations.
Domain 8: Skin Disorders (10%)
Atopic dermatitis, urticaria, and other cutaneous manifestations of allergic and immunologic disease.
Together, Basic Science, Pulmonary Diseases, and Allergic/Non-Allergic Upper Respiratory Tract Diseases account for more than half the exam's weight. If your time is limited, that's where triage begins.
Eligibility and Registration Mechanics
Before you can register, you need AOBIM or AOBP primary certification, an active unrestricted medical license, documented professional and ethical standing, and verified qualifying allergy/immunology fellowship training. Senior fellows have a narrow but real allowance: you may sit for the exam after completing at least 80% of required clinical rotations, though your certification won't be finalized until your training is fully verified as complete. Full detail on documentation and timing lives in the Adult & Pediatric Allergy & Immunology Requirements guide.
| Item | Detail |
|---|---|
| Initial exam fee | $1,700 |
| Retake fee | $1,400 |
| Cancellation refund window | Written cancellation at least 15 full days before exam date |
| Cancellation processing fee | $300 deducted from refund |
| Certificate term (pre-2025 cohort) | 10 years |
| Certificate term (2025 cohort) | 2 years |
For a complete cost walkthrough, including how the cancellation fee and retake pricing interact, check the Adult & Pediatric Allergy & Immunology Certification Cost breakdown. If you're still confirming your registration window against the fellowship calendar, the Exam Dates 2026 guide lays out scheduling and deadline mechanics in detail.
How Scoring Actually Works
Passing requires a scaled score of 500 on a 200-800 scale. This is not a raw percentage-correct threshold - the scaling accounts for question difficulty across different exam forms, so you can't simply count how many of the 250 questions you think you answered correctly and assume that maps directly to a pass or fail. For a full explanation of how the scaled score interacts with the four-section format, see the Passing Score 2026 guide.
A Domain-Weighted Study Timeline
Generic study techniques - spaced repetition, active recall, timed question blocks - all work here, but only if you sequence them against the actual domain weights rather than studying topics in whatever order a textbook presents them. Below is a sample allocation built around the blueprint's own percentages.
Basic Science (30%)
- Build a mechanistic outline of immune signaling and cell biology
- Drill genetics and molecular immunology with spaced repetition since this domain rewards recall precision
Pulmonary Diseases (13%) & Upper Respiratory Tract Diseases (13%)
- Pair these two domains since asthma and rhinitis pathophysiology overlap heavily
- Practice distinguishing allergic from non-allergic presentations in both age groups
Hypersensitivity Reactions and Mast Cell Disorders (11%)
- Focus on anaphylaxis mechanisms and drug reaction classification
Immunodeficiencies (10%), GI Disorders (10%), Skin Disorders (10%)
- Rotate daily between these three equally-weighted domains
Autoimmunity (3%) & Full Review
- Cover the smallest domain quickly, then run full-length timed blocks matching the 90-minute section structure
If you want a condensed, at-a-glance version of everything above for last-week review, the Adult & Pediatric Allergy & Immunology Cheat Sheet compiles the domain weights, fee figures, and format facts on one page. For gauging whether your prep pace is realistic, also read How Hard Is the Adult & Pediatric Allergy & Immunology Exam? and the Pass Rate 2026 data analysis.
Remote Testing Logistics You Can't Ignore
Because delivery runs through MonitorEDU on the PARADIGM platform, your preparation isn't purely academic - it includes environment setup. You'll need a suitable computer, a smartphone with a working camera for remote proctoring, valid identification, and a private space free of interruptions for the full 6-hour-50-minute appointment. Electronic lab values, an on-screen calculator, and a digital scratchpad are all provided within the platform, so you don't need to bring or memorize reference tables for those.
Key Takeaway
Test your camera, internet connection, and room setup at least a few days before appointment day - remote-proctoring failures are an avoidable risk that has nothing to do with content mastery.
Once you're certified, maintenance shifts to a different track entirely: OCC involves 16 untimed, open-resource PAAI questions annually, a 70% annual passing criterion, a $250 annual assessment fee, licensure and primary-board CME compliance, and one quality-improvement activity every ten years. New diplomates begin this cycle after one full calendar year of certification - for example, the 2025 cohort starts in 2027. That's a separate topic from initial exam prep, but worth knowing exists before you sit for the exam covered in this guide.
If you're weighing whether the entire credentialing path - fellowship, exam fees, and ongoing OCC obligations - pays off relative to your career goals, the ROI Analysis and Salary Guide both address that question directly. And if you're still exploring what certified allergy/immunology physicians actually do day to day, Adult & Pediatric Allergy & Immunology Jobs and Adult & Pediatric Allergy & Immunology Training cover the practice landscape and fellowship pathway respectively.
To build exam-day stamina before your real appointment, run practice sessions that mirror the actual 90-minute section structure rather than open-ended study blocks - you can find full-length timed practice questions at the main practice test site, and it's worth returning there periodically as you move through the timeline above to check retention across domains, not just within the one you studied most recently. Combining that repeated self-testing with the domain-by-domain notes on the practice platform tends to surface weak spots earlier than passive review alone.
Frequently Asked Questions
The exam has 250 multiple-choice questions split into four 90-minute sections of 63, 62, 63, and 62 questions each.
You need a scaled score of 500 on a 200-800 scale. This is not a fixed percentage-correct cutoff - see the Passing Score guide for more detail.
Basic Science, weighted at 30% of the exam, is the largest single domain and the logical starting point for most candidates.
Senior fellows may sit for the exam after completing at least 80% of required clinical rotations, though certification itself requires verified completion of training.
A written cancellation submitted at least 15 full days before the exam qualifies for a refund, minus a $300 processing fee.
For the full landscape of terminology and related questions candidates search for, see What Does Adult & Pediatric Allergy & Immunology Stand For?, What Is A Adult & Pediatric Allergy & Immunology?, and What Is Adult & Pediatric Allergy & Immunology Certification?.