Orthopedic Surgery Certification

What Certification in Orthopedic Surgery Actually Covers

When this site refers to Orthopedic Surgery Certification, it means the pathway administered by the American Osteopathic Board of Orthopedic Surgery (AOBOS) - specifically the Part I Written Exam that osteopathic orthopedic surgeons must pass before moving to the Clinical Exam and full board certification. This is not a general survey of every credential that shares similar letters; it is a focused look at the AOBOS pathway, its written exam mechanics, and how candidates prepare for it.

The Part I Written Exam is a standardized, multiple-choice assessment of orthopedic knowledge across ten defined domains. It is the gateway exam: candidates must clear it before they are eligible to schedule the separate Clinical Exam, which involves case documentation and oral defense. Because Part I is where most candidates spend the bulk of their preparation time, this article concentrates on that written exam - its structure, eligibility rules, fees, and content weighting - while touching briefly on what comes after.

Who Administers It, Who Qualifies, and When

The AOBOS oversees the entire certification process for osteopathic orthopedic surgeons, and eligibility for Part I is tied to residency training rather than years in independent practice. Candidates qualify if they have either:

• Graduated from an ACGME-accredited orthopedic surgery residency program, or
• Reached PGY-4 or PGY-5 status in such a program (PGY-4 applicants need program-director approval to sit early).

Beyond training status, candidates must also satisfy the board's application and ethics requirements before a seat is confirmed. If you're mapping out whether you meet these thresholds, the detailed breakdown in Orthopedic Surgery Requirements 2026: Eligibility, Prerequisites & How to Qualify walks through each condition in sequence.

The written exam is administered once per year, during the second week of May. That single annual sitting is a key planning constraint - miss the application window and you wait a full year for another attempt, so eligibility verification should happen well before the deadlines described below.

Written Exam Format, Timing, and Scoring

The Part I Written Exam consists of 250 multiple-choice questions split into three sections, each allotted 120 minutes. That's six hours of active testing time, plus two optional 15-minute breaks, bringing the total seated time to six hours and thirty minutes if both breaks are used.

Scoring is reported on a scaled range of 200 to 800, with a passing score of 500. Candidates receive a scaled score rather than a raw percentage, which means the passing bar is fixed relative to the scale rather than shifting with each form's difficulty. For a full explanation of how that scaled score is derived and what it means for borderline performance, see Orthopedic Surgery Passing Score 2026: Exactly What You Need to Pass.

The published pass rate of 98.2% is a five-year aggregate figure for first-time, board-eligible examinees - not a single administration's result. Treat it as a long-run signal about the exam's overall pass dynamics, not a guarantee for any individual sitting. A deeper look at how that number is calculated and what it implies about preparation timelines is available in Orthopedic Surgery Pass Rate 2026: What the Data Shows.

Fees, Application Windows, and Deadlines

The AOBOS Part I Written Exam carries a $1,000 fee, all figures in USD. First-time AOAO resident members can request a $500 coupon discount, cutting the effective cost to $500. This coupon is distinct from the separate Clinical Exam fee of $2,250 (with a $250 late fee after its first deadline) - the Clinical Exam is a different stage with its own cost structure and should not be confused with Part I pricing.

Application timing follows a predictable annual cycle:

• October - applications open
• First business day in March - first (standard) deadline
• First business day in April - final deadline
• Second week of May - exam administered

For a month-by-month calendar and how these dates interact with residency schedules, check Orthopedic Surgery Exam Dates 2026: Testing Windows, Deadlines & Scheduling. If you want the full fee picture including OCC and Clinical Exam costs side by side, Orthopedic Surgery Certification Cost 2026: Complete Pricing Breakdown lays it out line by line.

The Ten Written-Exam Domains

AOBOS publishes official percentage ranges for each of the ten content domains on the Part I exam, and these ranges should be read as bands, not fixed targets - they reflect how test forms are assembled, not a rigid quota per exam. Basic Science is the single largest domain, followed closely by Joint and Trauma.

Because these weights are unevenly distributed, allocating equal study time to all ten domains is a common and costly mistake. A domain-by-domain breakdown of what's actually tested inside each area - beyond the percentage ranges - is covered in Orthopedic Surgery Exam Domains 2026: Complete Guide to All 10 Content Areas.

Remote Proctoring and Test-Day Logistics

The Part I Written Exam is delivered under AOA's MonitorEDU/PARADIGM remote-proctoring arrangement. Candidates are responsible for a private testing room, a compatible computer and mobile device, the required secure browser, and completed technical checks well before exam day - technical failures on test day are the candidate's responsibility to prevent, not the proctoring system's to absorb.

On the content-support side, AOBOS permits physical whiteboards during the exam, and the testing platform itself supplies an online calculator, a digital scratch pad, and reference laboratory values. Knowing these tools exist in advance lets you practice using them rather than discovering them mid-exam.

Beyond Part I: Clinical Exam and OCC

Passing Part I is necessary but not sufficient for full certification. Candidates must also complete the Clinical Exam, which includes surgical-practice documentation and an oral defense of selected cases, followed by AOA approval. That exam has its own fee ($2,250, plus a $250 late fee after its first deadline) and its own timeline, entirely separate from Part I's application cycle.

Once certified, diplomates enter Osteopathic Continuous Certification (OCC), which requires active licensure, continuing medical education, longitudinal assessment, and a quality-improvement attestation. For the 2025-2027 cycle, time-limited and participating OCC diplomates need 60 CME credits, including at least 15 Category 1-A credits.

The traditional ten-year high-stakes recertification exam was replaced in 2021 by a longitudinal assessment model. That assessment costs $230 annually and consists of 15 untimed, open-book, article-based questions drawn from three of nine assessment areas (distinct from the ten initial written-exam domains). Passing requires 80%, with a second attempt available before the end-of-July deadline; the assessment window itself runs May through July each year, and newly certified diplomates get one full calendar year before participation is required.

Building a Domain-Weighted Study Plan

Generic study techniques - spaced repetition, timed practice blocks, active recall - only pay off when they're mapped onto the actual domain weights above. Given that Basic Science, Joint, and Trauma together account for a large share of the 250 questions, a study calendar that spends disproportionate early weeks on Tumor or Infection at the expense of those three domains is working against the exam's own structure.

A more complete week-by-week framework, including how to sequence review against the application deadlines, is available in Orthopedic Surgery Study Guide 2026: How to Pass on Your First Attempt. If you're still deciding how demanding this exam is relative to your current knowledge base, How Hard Is the Orthopedic Surgery Exam? Complete Difficulty Guide 2026 breaks down the difficulty factors in more detail. And for structured, domain-weighted practice questions that mirror the actual format, you can start working through sets on the practice test platform rather than relying solely on passive review.

Frequently Asked Questions