- Blueprint Overview: The Seven-Category Outline
- Domain 1: Lower Extremity - Hip (10-14%)
- Domain 2: Lower Extremity - Knee (15-21%)
- Domain 3: Lower Extremity - Foot and Ankle (11-17%)
- Domain 4: Upper Extremity - Shoulder (12-18%)
- Domain 5: Upper Extremity - Elbow (10-16%)
- Domain 6: Upper Extremity - Wrist and Hand (12-14%)
- Domain 7: Non-Operative (11-17%)
- How the Domains Map to Exam Format
- Allocating Study Time Across Domains
- FAQ
- The initial written exam blueprint has seven categories, reviewed September 22, 2026, with published percentage ranges rather than fixed weights.
- Knee carries the highest ceiling at up to 21%, making it the single most consequential domain to master.
- The exam is 200 questions split into two 100-question, 120-minute sections, totaling 4 hours plus an optional 10-minute break.
- Passing requires a scaled score of 500 or higher on the AOA's 200-800 scale, not a raw percentage-correct cutoff.
Blueprint Overview: The Seven-Category Outline
The AOBOS Certification in Orthopedic Sports Medicine initial written examination is organized around a current, official seven-category outline that was last reviewed September 22, 2026. Each category is published as a percentage range - not a midpoint estimate and not a fixed allocation - which means the exact number of questions from any one domain can shift slightly from year to year within that published band.
Understanding these ranges matters for two reasons. First, they tell you where the exam committee expects the bulk of clinical reasoning to be tested: the lower extremity categories combined (hip, knee, foot and ankle) can account for well over a third of the exam. Second, they help you avoid the common mistake of treating all seven domains as equally weighted when building a study plan. If you're still mapping out your overall approach, the Orthopedic Sports Medicine Study Guide 2026 walks through how to sequence review around a blueprint like this one.
| Domain | Published Range |
|---|---|
| Lower Extremity: Hip | 10-14% |
| Lower Extremity: Knee | 15-21% |
| Lower Extremity: Foot and Ankle | 11-17% |
| Upper Extremity: Shoulder | 12-18% |
| Upper Extremity: Elbow | 10-16% |
| Upper Extremity: Wrist and Hand | 12-14% |
| Non-Operative | 11-17% |
Domain 1: Lower Extremity - Hip (10-14%)
Hip: Core Content Expectations
The hip domain sits at the lower end of the seven-category range but still requires command of both operative and diagnostic reasoning specific to orthopedic sports medicine practice rather than general orthopedic surgery.
- Femoroacetabular impingement patterns and labral pathology
- Hip arthroscopy indications, portal placement, and complication avoidance
- Athletic pubalgia and core muscle injury differentiation
- Hip flexor and abductor tendon pathology in athletes
Because hip questions make up a smaller slice of the exam than knee or shoulder, candidates often shortchange this domain during review. Given the operative case log requirements tied to certification - including a minimum arthroscopy threshold - hip arthroscopy concepts deserve dedicated attention even at a modest exam weight.
Domain 2: Lower Extremity - Knee (15-21%)
Knee: The Highest-Weighted Domain
Knee has the highest upper bound of any category at 21%, which makes it the single domain most likely to determine whether borderline scores clear the 500-point scaled threshold.
- ACL, PCL, and multiligament knee injury management and reconstruction techniques
- Meniscal repair versus meniscectomy decision-making
- Patellofemoral instability and cartilage restoration procedures
- Postoperative rehabilitation protocols and return-to-play criteria
Key Takeaway
Because knee questions can approach a fifth of the exam, allocate proportionally more review time here than to any other single domain, and revisit it more than once across your study calendar.
Domain 3: Lower Extremity - Foot and Ankle (11-17%)
Foot and Ankle: Broad Range, Broad Content
This domain's wide range (11-17%) reflects the breadth of pathology candidates must know, from ligamentous ankle injuries common in field-sport athletes to more complex midfoot and hindfoot conditions.
- Lateral ankle instability and syndesmotic injury evaluation
- Achilles tendon pathology and rupture management
- Turf toe and lesser toe sports injuries
- Stress fractures in the athletic foot
Domain 4: Upper Extremity - Shoulder (12-18%)
Shoulder: The Leading Upper Extremity Domain
Shoulder content carries the highest upper-extremity ceiling at 18%, second overall only to the knee. Expect emphasis on instability and rotator cuff pathology given how frequently these present in sports medicine practice.
- Anterior and posterior glenohumeral instability, including labral repair techniques
- Rotator cuff tear classification and repair approach
- SLAP lesions and internal impingement in overhead athletes
- Acromioclavicular joint injuries
Domain 5: Upper Extremity - Elbow (10-16%)
Elbow: Throwing-Athlete Focus
Elbow pathology in overhead and throwing athletes is a natural focus for this domain, spanning both ligamentous reconstruction and nerve-related complications.
- Ulnar collateral ligament injury and reconstruction (throwing athletes)
- Medial and lateral epicondylitis management
- Elbow instability and osteochondritis dissecans
- Ulnar nerve transposition considerations
Domain 6: Upper Extremity - Wrist and Hand (12-14%)
Wrist and Hand: The Narrowest Range
This is the only domain with a range narrower than four percentage points (12-14%), meaning its exam representation is relatively predictable year to year compared to the other six categories.
- Scaphoid fractures and carpal instability in athletes
- TFCC injuries and ulnar-sided wrist pain
- Finger and thumb ligamentous injuries (e.g., gamekeeper's thumb)
- Return-to-sport splinting and bracing considerations
Domain 7: Non-Operative (11-17%)
Non-Operative: Frequently Underestimated
The Non-Operative domain spans an 11-17% range and covers the medical, rehabilitative, and preventive side of sports medicine practice rather than surgical technique. Candidates coming from a surgical fellowship background sometimes under-prepare this category relative to its potential weight.
- Concussion management and return-to-play protocols
- Exercise physiology and injury prevention programs
- Therapeutic injections, bracing, and orthobiologics
- Medical conditions in athletes (cardiac screening, heat illness, nutrition)
How the Domains Map to Exam Format
All seven domains are tested across a single 200-question multiple-choice examination, split into two 100-question sections. Each section runs 120 minutes, giving candidates 4 hours of total answering time, plus an optional 10-minute scheduled break between sections - a total testing window of 4 hours 10 minutes. Questions from all seven domains can appear in either section; the two-section split is a timing and pacing structure, not a domain separation.
Passing is determined by a scaled score of at least 500 on the AOA's 200-800 scale, not by hitting a fixed percentage of correct answers per domain. That scoring model means a strong performance in a high-weight domain like Knee can meaningfully offset softer performance elsewhere, which is one more reason to prioritize study time according to the published ranges above. For a deeper breakdown of exactly what that scaled score means in practice, see the Orthopedic Sports Medicine Passing Score 2026 guide.
Candidates should also confirm eligibility and scheduling mechanics well before diving into domain-level content. Admission to the initial exam is permitted immediately after completing a minimum one-year ACGME-accredited sports medicine fellowship, with completion verification, active U.S. medical licensure, and adherence to the AOA Code of Ethics. Full requirement details, including the limited pathway available for the 2026, 2027, and 2028 exam administrations, are covered in the Orthopedic Sports Medicine Requirements 2026 article. The 2026 exam date and its application window are detailed separately in the Orthopedic Sports Medicine Exam Dates 2026 guide.
Key Takeaway
Since the exam is remote-proctored, review the technical requirements - private space, identification, secure-browser setup, a supported computer, and mobile monitoring - well before test day so domain knowledge isn't undermined by logistics.
Allocating Study Time Across Domains
A domain-weighted study calendar should mirror the published ranges rather than splitting time evenly across all seven categories. Because Knee (15-21%) and Shoulder (12-18%) carry the two highest ceilings, they warrant the largest blocks of dedicated review, ideally revisited more than once before test day rather than covered in a single pass.
Knee and Shoulder
- Build core content knowledge for the two highest-weighted domains first
- Work through operative and rehab decision points for both joints
Foot/Ankle and Non-Operative
- Cover the two 11-17% domains together since both involve broad, varied topic lists
- Pay particular attention to concussion protocols and rehabilitation principles
Hip, Elbow, and Wrist/Hand
- Review the three narrower-weighted domains
- Use case-log-relevant procedures (arthroscopy-heavy topics) as anchor points
Full-Blueprint Review
- Cycle back through all seven domains proportionally to their weight ranges
- Simulate the two 100-question, 120-minute sections under timed conditions
This kind of weighted sequencing is one piece of a larger preparation strategy; for a complete walkthrough of resources, timelines, and first-attempt pass strategy, see the full Orthopedic Sports Medicine Study Guide 2026. You can also practice under realistic timed conditions using the tools on the main practice test platform to build stamina for the full 4-hour, two-section format.
Once you're certified, maintenance shifts from a single high-stakes exam to ongoing OCC activity, including CME (60 credits over the 2025-2027 cycle, with 15 Category 1-A) and the sports subspecialty longitudinal assessment - 20 annual, untimed, open-book, article-based questions with an 80% passing criterion and a $270 annual fee. That's a separate discussion from domain-level exam prep, but worth knowing as you plan your broader certification timeline; see Orthopedic Sports Medicine Certification Cost 2026 for the full fee picture, including the $3,000 initial examination fee.
If you're still deciding whether pursuing this credential fits your career plans, resources like Is the Orthopedic Sports Medicine Certification Worth It? and Orthopedic Sports Medicine Jobs address how this domain knowledge translates into practice opportunities after certification. And if any of the terminology here is new to you, What Is Orthopedic Sports Medicine? offers useful background before you dive into domain-level study.
FAQ
Start with Knee, since it has the highest published upper bound (21%), followed by Shoulder (18%). Building strength in these two domains early gives you the most exam-weight return on your initial study hours.
No. The blueprint publishes ranges rather than fixed allocations, so the exact number of questions from a given domain can vary within its published range from one administration to the next.
Yes. The exam consists of two 100-question, 120-minute sections, and questions from any of the seven domains can appear in either section - the sections are a timing structure, not a domain-by-domain split.
Its range (11-17%) can exceed some joint-specific domains like Hip (10-14%) or Wrist and Hand (12-14%), so it deserves a dedicated study block covering concussion management, rehabilitation, injections, and medical conditions in athletes rather than incidental coverage.
Review the Orthopedic Sports Medicine Requirements 2026 guide first, since exam admission depends on fellowship completion, active licensure, and adherence to the AOA Code of Ethics before domain-level content preparation becomes relevant.