- Overview: What This Certification Actually Is
- Who Issues It and Who Qualifies
- Exam Format: Structure, Timing, and Delivery
- The Eight Content Domains
- Passing Score and How It's Calculated
- Fees, Registration, and Cancellation Rules
- After You Pass: OCC and Maintenance
- Preparing Strategically by Domain Weight
- Who Hires Diplomates
- Frequently Asked Questions
- The exam is administered by the AOA's American Osteopathic Conjoint Examination Committee, program acronym PAAI.
- 250 multiple-choice questions across four 90-minute sections, delivered remotely via MonitorEDU on PARADIGM.
- Passing requires a scaled score of 500 on a 200-800 scale, not a raw percentage.
- Basic science carries the heaviest weight at 30% of the eight-domain blueprint.
Overview: What This Certification Actually Is
Certification in Adult & Pediatric Allergy & Immunology Subspecialty is an osteopathic conjoint subspecialty credential administered through the American Osteopathic Conjoint Examination Committee on Pediatric and Adult Allergy and Immunology, operating under the American Osteopathic Association (AOA). Within the certifying body's own materials, the program is referred to by the acronym PAAI. This is distinct from the ongoing maintenance pathway - the Osteopathic Continuous Certification (OCC) longitudinal assessment - which is a separate, later requirement for diplomates who already hold the credential. This article, and the rest of this site, focuses on the initial examination that a fellowship-trained physician sits to earn the credential in the first place.
If you are early in your research and still orienting yourself to terminology, it helps to read a companion explainer like Adult & Pediatric Allergy & Immunology Meaning alongside this page, since both cover the identity of the credential from slightly different angles.
Who Issues It and Who Qualifies
Eligibility for the initial examination is not open to any licensed physician who wants to sit for it. Candidates must already hold primary certification through the American Osteopathic Board of Internal Medicine (AOBIM) or the American Osteopathic Board of Pediatrics (AOBP). On top of that primary board credential, candidates need:
- An active, unrestricted medical license
- Documented professional and ethical standing
- Qualifying allergy/immunology fellowship training with verification from the training program
One notable allowance exists for physicians still finishing training: senior fellows may sit for the examination after completing at least 80% of their required clinical rotations. However, the credential itself is not finalized until the board receives verified completion of the full fellowship. In other words, you can test slightly ahead of graduation, but you cannot be certified ahead of it.
For a full breakdown of every prerequisite, licensure detail, and verification step, see Adult & Pediatric Allergy & Immunology Requirements 2026: Eligibility, Prerequisites & How to Qualify.
Exam Format: Structure, Timing, and Delivery
The initial examination is built around 250 multiple-choice questions divided into four sections, each running 90 minutes. The section-by-section question counts are 63, 62, 63, and 62 - nearly identical splits that keep pacing consistent across the day. Between sections, candidates get scheduled breaks of 10, 30, and 10 minutes. Add it up: six hours of actual answering time plus 50 minutes of breaks gives the full 6-hour-50-minute exam-day schedule.
Delivery is entirely remote-proctored. Candidates test through MonitorEDU proctoring on the PARADIGM examination platform, from their own location, provided they have:
- A suitable computer with a stable connection
- A smartphone with a working camera for proctoring
- Government-issued identification
- A private, distraction-free test space
Electronic lab values, an on-screen calculator, and a digital scratchpad are all provided within the testing platform, so candidates don't need to bring or memorize reference ranges - though understanding what a given lab pattern means clinically is still very much tested.
Key Takeaway
Because delivery is remote, treat your testing environment as part of your preparation: test your webcam, internet stability, and room setup with MonitorEDU well before exam day, not the morning of.
For a deeper look at scheduling windows and deadlines tied to this format, check Adult & Pediatric Allergy & Immunology Exam Dates 2026: Testing Windows, Deadlines & Scheduling.
The Eight Content Domains
The initial examination blueprint is organized into eight content areas that together account for 100% of the exam. This differs from the OCC maintenance blueprint, which is weighted differently and covers a separate assessment cycle. For the initial exam, the breakdown is:
Domain 1: Basic Science (30%)
By far the heaviest-weighted domain. Expect deep coverage of immunologic mechanisms, cellular and molecular immunology, and the physiologic foundations underlying every clinical topic elsewhere on the exam.
- Treat this as the backbone domain - weak basic science understanding weakens performance everywhere else
Domain 2: Primary and Secondary Immunodeficiencies (10%)
Covers recognition and management of congenital and acquired immunodeficiency syndromes across both adult and pediatric populations.
Domain 3: GI Disorders (10%)
Focuses on the allergic and immunologic conditions that manifest in the gastrointestinal tract.
Domain 4: Autoimmunity and Other Immunological Disorders (3%)
The smallest-weighted domain, but still tested - don't skip it entirely even though it's a minor slice of the total.
Domain 5: Pulmonary Diseases (13%)
Asthma and related airway disease sit here, tested at a meaningfully high weight given how central pulmonary presentations are to allergy/immunology practice.
Domain 6: Hypersensitivity Reactions and Mast Cell Disorders (11%)
Covers the classic hypersensitivity classifications along with mast cell activation and related disorders.
Domain 7: Allergic and Non-Allergic Upper Respiratory Tract Diseases (13%)
Rhinitis, sinusitis, and related upper airway conditions - tied with pulmonary disease as the second-heaviest clinical domain.
Domain 8: Skin Disorders (10%)
Dermatologic manifestations of allergic and immunologic disease, tested at the same weight as GI disorders and immunodeficiencies.
Notice that Basic Science, Pulmonary Diseases, and Allergic/Non-Allergic Upper Respiratory Tract Diseases together account for more than half the exam. A candidate who under-prepares any one of those three domains takes on disproportionate risk. For a domain-by-domain study approach, see Adult & Pediatric Allergy & Immunology Exam Domains 2026: Complete Guide to All 8 Content Areas.
Passing Score and How It's Calculated
Passing the initial examination requires a scaled score of 500 on a 200-800 scale. This is an important distinction: it is not a fixed percentage-correct threshold like "70% correct passes." Scaled scoring accounts for question difficulty across the exam form, so two candidates who answer a different raw number of questions correctly could both land at or above 500 depending on which questions they got right and how those items are weighted.
For the full mechanics of how the scaled score works and what it implies for study targets, read Adult & Pediatric Allergy & Immunology Passing Score 2026: Exactly What You Need to Pass.
Fees, Registration, and Cancellation Rules
The initial examination carries a cost of $1,700. If a candidate needs to retake the exam, the retake fee is $1,400. Cancellation policy is specific: a written cancellation submitted at least 15 full days before the scheduled exam date qualifies for a refund, minus a $300 processing fee. Cancel later than that window, and the refund terms change unfavorably, so mark your calendar the moment you schedule.
| Item | Amount |
|---|---|
| Initial examination fee | $1,700 |
| Retake examination fee | $1,400 |
| Cancellation processing fee (if cancelled 15+ days prior) | $300 |
| OCC annual assessment fee | $250 |
For the complete cost picture, including how OCC fees layer on after certification, see Adult & Pediatric Allergy & Immunology Certification Cost 2026: Complete Pricing Breakdown.
After You Pass: OCC and Maintenance
Earning the initial credential is not the end of the process. The board issues certificate terms of ten years for diplomates certified before 2025, while the 2025 cohort receives a shorter two-year term. New diplomates don't begin Osteopathic Continuous Certification (OCC) immediately - OCC starts after one full calendar year of certification, meaning the 2025 cohort begins its OCC cycle in 2027.
OCC itself is built around several components:
- 16 untimed, open-resource PAAI questions answered annually
- A 70% annual passing criterion on those questions
- A $250 annual assessment fee (the 2026 assessment cycle uses the AOA Learning Portal)
- Continued active licensure
- Compliance with primary-board CME requirements - notably, there is no additional conjoint-subspecialty CME quota layered on top
- One quality-improvement activity completed every ten years
Key Takeaway
OCC is untimed and open-resource, which makes it fundamentally different in character from the initial exam - but it still requires annual attention and the $250 fee, so budget for it as an ongoing cost of holding the credential.
Preparing Strategically by Domain Weight
Generic study advice rarely accounts for the fact that this exam's eight domains are wildly uneven in weight - 30% versus 3% is not a small gap. A weekly study plan should mirror the blueprint rather than treat every domain as equally important.
Basic Science (30%)
- Build the immunologic foundation first since it underpins clinical reasoning in every other domain
Pulmonary Diseases (13%) and Upper Respiratory Tract Diseases (13%)
- Tackle these two highest-weighted clinical domains together since presentations often overlap
Hypersensitivity Reactions and Mast Cell Disorders (11%)
- Reinforce classification systems and clinical triggers
Immunodeficiencies, GI Disorders, Skin Disorders (10% each)
- Rotate through these three equally-weighted domains in a single focused week
Autoimmunity and Other Disorders (3%) plus full review
- Close out the lightest domain, then run timed practice blocks matching the 90-minute section structure
This weighting-first approach - not a generic Pomodoro or flashcard schedule - is the difference between studying broadly and studying strategically. For a more detailed week-by-week plan, see the Adult & Pediatric Allergy & Immunology Study Guide 2026: How to Pass on Your First Attempt, and pair it with realistic timed sections using our practice test platform to simulate the four 90-minute blocks before exam day.
Who Hires Diplomates
Physicians pursuing this credential are typically osteopathic internists or pediatricians who completed an allergy/immunology fellowship and want board recognition specific to the AOA pathway. Holding this certification alongside AOBIM or AOBP primary certification signals to hospital credentialing committees, academic medical centers, and private allergy/immunology practices that a physician has met a defined, externally validated standard in both adult and pediatric allergy and immunology care. It's frequently a credentialing requirement - not just a resume enhancer - for clinical privileges in this subspecialty.
To understand how this credential factors into hiring and long-term career decisions, see Adult & Pediatric Allergy & Immunology Jobs and the broader analysis in Is the Adult & Pediatric Allergy & Immunology Certification Worth It? Complete ROI Analysis 2026.
If you're still weighing how much effort the exam demands relative to other board exams you may have taken, How Hard Is the Adult & Pediatric Allergy & Immunology Exam? Complete Difficulty Guide 2026 walks through the format and content load in more detail, and practicing under real exam conditions is the most reliable way to gauge your own readiness.
Frequently Asked Questions
PAAI is the acronym used by the American Osteopathic Conjoint Examination Committee's program for Pediatric and Adult Allergy and Immunology certification, administered under the AOA.
No. OCC (Osteopathic Continuous Certification) is a separate, longitudinal maintenance assessment taken after initial certification, with its own blueprint, question format, and annual fee. This article covers the initial examination.
Senior fellows may test after completing at least 80% of required clinical rotations, but the certification itself is not finalized until the board verifies full completion of training.
The exam totals 250 multiple-choice questions across four 90-minute sections (63, 62, 63, and 62 questions), with 10-, 30-, and 10-minute breaks, for a full schedule of six hours of answering plus 50 minutes of breaks.
A written cancellation submitted at least 15 full days before the exam date qualifies for a refund, minus a $300 processing fee.