- What the Credential Actually Is
- Who Grants It and Who Is Eligible
- Exam Structure and Delivery
- The Eight Content Domains
- Fees, Refunds, and Retakes
- How Passing Is Determined
- After You Pass: OCC and Recertification
- Mapping a Study Plan to the Blueprint
- Who Hires Candidates With This Credential
- Frequently Asked Questions
- This credential is administered by the American Osteopathic Conjoint Examination Committee on Pediatric and Adult Allergy and Immunology under the AOA, using...
- The initial exam has 250 questions across four 90-minute sections (63, 62, 63, 62 questions), for a 6-hour-50-minute total schedule including breaks.
- Passing requires a scaled score of 500 on a 200-800 scale - not a raw percent-correct cutoff.
- Eligibility requires AOBIM or AOBP primary certification plus verified allergy/immunology fellowship training.
What the Credential Actually Is
Certification in Adult & Pediatric Allergy & Immunology Subspecialty is an osteopathic subspecialty credential overseen by the American Osteopathic Conjoint Examination Committee on Pediatric and Adult Allergy and Immunology, operating under the American Osteopathic Association (AOA). The exam program itself is referred to as PAAI. This site is focused specifically on the initial subspecialty certification exam - the one candidates sit for the first time after fellowship - rather than the separate Osteopathic Continuous Certification (OCC) longitudinal assessment that maintains a credential over time.
If you've landed here searching for a general definition, it's worth being precise: several credentials in medicine share overlapping abbreviations across allergy and immunology practice. This article, and the rest of this site, refers only to the AOA-affiliated PAAI initial certification exam described in the official program materials linked at the end of this guide.
Who Grants It and Who Is Eligible
Before you can sit for the exam, you need to satisfy several eligibility conditions set by the certifying committee:
- Primary certification through AOBIM (American Osteopathic Board of Internal Medicine) or AOBP (American Osteopathic Board of Pediatrics).
- An active, unrestricted medical license.
- Documented professional and ethical standing.
- Qualifying allergy/immunology fellowship training, with formal verification submitted to the board.
There's a notable accommodation for fellows still finishing training: senior fellows may sit for the exam after completing at least 80% of required clinical rotations. That said, actual certification is not awarded until the board has verified full completion of training - passing the exam early doesn't substitute for finishing the fellowship. For a full breakdown of every prerequisite, see the dedicated Adult & Pediatric Allergy & Immunology Requirements 2026 guide.
Exam Structure and Delivery
The initial exam is a substantial undertaking in both length and logistics. It consists of 250 multiple-choice questions split across four 90-minute sections, with 63, 62, 63, and 62 questions respectively. Between sections, candidates get scheduled breaks of 10, 30, and 10 minutes. Add it up and you get six hours of active answering time plus 50 minutes of breaks - a 6-hour-50-minute total exam-day schedule.
Delivery is entirely remote. The exam is proctored through MonitorEDU and runs on the PARADIGM examination platform. Candidates need a suitable computer, a smartphone with a working camera (used for proctoring angles), valid identification, and a private, distraction-free test space. On the content side, the platform supplies electronic lab values, an on-screen calculator, and a digital scratchpad - you don't need to bring or memorize reference ranges that the platform provides during the test.
Key Takeaway
Because this is a remote exam, test-day logistics (camera setup, room check, ID verification) matter as much as content mastery. Do a full dry run with your equipment before exam day.
For a detailed walkthrough of scheduling windows and deadlines, check the Adult & Pediatric Allergy & Immunology Exam Dates 2026 guide.
The Eight Content Domains
The initial exam blueprint is organized into eight content areas that together total 100% of the exam. Note that this blueprint applies specifically to the initial exam - the OCC blueprint used for continuous certification is structured differently.
Domain 1: Basic Science (30%)
By far the heaviest-weighted domain, nearly a third of the entire exam. Expect deep coverage of immunologic mechanisms, cellular and molecular immunology, and the science underpinning clinical allergy/immunology practice.
- Treat this as the anchor domain in your study plan - errors here have outsized impact on your scaled score.
Domain 2: Primary and Secondary Immunodeficiencies (10%)
Covers recognition and management of both congenital and acquired immunodeficiency states relevant to adult and pediatric patients.
Domain 3: GI Disorders (10%)
Focuses on gastrointestinal manifestations of allergic and immunologic disease processes.
Domain 4: Autoimmunity and Other Immunological Disorders (3%)
The smallest-weighted domain, but still tested - don't skip it entirely when allocating study time.
Domain 5: Pulmonary Diseases (13%)
Asthma and related pulmonary conditions viewed through an allergy/immunology lens.
Domain 6: Hypersensitivity Reactions and Mast Cell Disorders (11%)
Covers the spectrum of hypersensitivity classifications and mast cell-driven disease.
Domain 7: Allergic and Non-Allergic Upper Respiratory Tract Diseases (13%)
Rhinitis, sinusitis, and related upper airway conditions - both allergic and non-allergic etiologies.
Domain 8: Skin Disorders (10%)
Dermatologic conditions with allergic or immunologic underpinnings.
Together, Basic Science, Pulmonary Diseases, and Allergic/Non-Allergic Upper Respiratory Tract Diseases account for more than half the exam's weighting. For a section-by-section breakdown of what each domain actually tests, see the Adult & Pediatric Allergy & Immunology Exam Domains 2026 guide.
Fees, Refunds, and Retakes
Budgeting for this exam involves a few concrete numbers straight from the certifying board:
| Item | Cost/Terms |
|---|---|
| Initial examination | $1,700 |
| Retake examination | $1,400 |
| Cancellation refund | Available with written cancellation at least 15 full days before the exam, less a $300 processing fee |
These figures apply specifically to the initial subspecialty exam covered on this site. If you cancel with less than 15 full days' notice, you should assume no refund is guaranteed. For a complete cost picture including OCC fees, visit the Adult & Pediatric Allergy & Immunology Certification Cost 2026 breakdown.
How Passing Is Determined
Passing is based on a scaled score of 500 on a 200-800 scale - not a fixed percentage of questions answered correctly. This distinction matters: the raw number of questions you get right is converted onto a scaled metric that accounts for question difficulty across the pool, so two candidates who each answer a different mix of questions correctly could both land at or above 500.
For more on how this scoring model works and what it means for your prep targets, see the Adult & Pediatric Allergy & Immunology Passing Score 2026 guide, and for a broader difficulty assessment, the How Hard Is the Adult & Pediatric Allergy & Immunology Exam? guide.
After You Pass: OCC and Recertification
Passing the initial exam isn't the end of the certification lifecycle. Certificate terms are structured as follows:
- Ten-year terms for certificates issued before 2025.
- A two-year term specifically for the 2025 cohort.
Maintenance happens through Osteopathic Continuous Certification (OCC), which for this subspecialty includes:
- 16 untimed, open-resource PAAI questions annually, with a 70% annual passing criterion.
- A $250 annual assessment fee (the 2026 assessment is administered through the AOA Learning Portal).
- Ongoing licensure and primary-board CME compliance - notably, there is no additional conjoint-subspecialty CME quota on top of your primary board's requirements.
- One quality-improvement activity every ten years.
New diplomates don't start OCC immediately - it begins after one full calendar year of certification, meaning the 2025 cohort starts its OCC obligations in 2027. This is a meaningfully different structure than the one-time initial exam, so don't confuse OCC content weighting with the initial-exam blueprint described above.
Mapping a Study Plan to the Blueprint
Rather than a generic study calendar, the smart approach is to size your time investment to each domain's exam weight. Since Basic Science alone is 30% of the exam, it deserves proportionally more weeks than Autoimmunity and Other Immunological Disorders at 3%.
Basic Science (30%)
- Build your foundation first since this domain underlies concepts tested elsewhere
- Use spaced repetition on immunologic mechanisms given the sheer volume of material
Pulmonary Diseases (13%) and Upper Respiratory Diseases (13%)
- Pair these together since both concern airway-related allergic disease
Hypersensitivity Reactions and Mast Cell Disorders (11%)
- Review classification systems and clinical presentations
Immunodeficiencies, GI, and Skin Disorders (10% each)
- Rotate through these three lower-weighted but substantial domains
Autoimmunity (3%) plus full-length timed review
- Simulate the 6-hour-50-minute exam-day schedule, including break timing, to build stamina
For a more detailed week-by-week plan and question-practice strategy, see the full Adult & Pediatric Allergy & Immunology Study Guide 2026. A condensed reference for the final week before your test is available in the Adult & Pediatric Allergy & Immunology Cheat Sheet 2026.
Who Hires Candidates With This Credential
Osteopathic physicians pursuing this subspecialty credential typically come from internal medicine (via AOBIM) or pediatrics (via AOBP) backgrounds, then complete allergy/immunology fellowship training before sitting for the PAAI exam. Once certified, diplomates typically practice in outpatient allergy/immunology clinics, hospital-affiliated allergy departments, academic medical centers with fellowship programs, and multi-specialty group practices that see both adult and pediatric allergy patients. Employers and credentialing committees generally view this subspecialty certification as validation of fellowship-level training on top of an already-completed primary board certification.
If you're weighing whether pursuing this credential fits your career path, the Is the Adult & Pediatric Allergy & Immunology Certification Worth It? analysis and the Adult & Pediatric Allergy & Immunology Salary Guide 2026 are useful starting points. You can also browse the broader practice-question library on the main Adult & Pediatric Allergy & Immunology practice test site to see how prep material aligns with the domains covered here.
Frequently Asked Questions
The American Osteopathic Conjoint Examination Committee on Pediatric and Adult Allergy and Immunology administers it under the American Osteopathic Association (AOA), using the PAAI exam program.
There are 250 multiple-choice questions divided into four 90-minute sections of 63, 62, 63, and 62 questions, with 10-, 30-, and 10-minute breaks, totaling 6 hours 50 minutes on exam day.
Senior fellows may sit for the exam after completing at least 80% of required clinical rotations, but the board still requires verified completion of full training before certification is granted.
A written cancellation submitted at least 15 full days before the exam date qualifies for a refund, minus a $300 processing fee.
No. Passing requires a scaled score of 500 on a 200-800 scale, not a raw percentage-correct threshold.
For related definitional questions and terminology clarifications, see What Is Adult & Pediatric Allergy & Immunology? and Adult & Pediatric Allergy & Immunology Meaning, or explore practice questions on the main practice test site to test your readiness against the eight domains above.