- What "Pass Rate" Means for the Orthopaedic Surgery CAQ
- What the Data Does and Does Not Show
- Why Pass-Rate Comparisons Mislead Candidates
- How the Exam Is Built: Format and Mechanics
- Where the Points Live: Blueprint Weighting
- The Eligibility Filter: Who Actually Sits the Exam
- Retake Economics and the Six-Year Window
- A Blueprint-Driven Prep Sequence
- Frequently Asked Questions
- Fractures/Dislocations and Soft-Tissue Injuries and Disorders are 25% each; Joint Disorders adds 20%, so three domains carry 70%.
- The initial exam is 120 multiple-choice questions in two 60-question, 60-minute blocks, and you cannot review the other block.
- A retake within the six-year window costs $250, versus $350 total for the first attempt.
- Candidates must already hold PA-C, 4,000 specialty hours, and 75 Category I CME credits before testing.
What "Pass Rate" Means for the Orthopaedic Surgery CAQ
Candidates searching for a PA-COS pass rate usually want one number: the percentage of test-takers who pass on the first try. Before chasing that figure, it helps to be precise about what this credential is. On this site, PA-COS refers to the Certificate of Added Qualifications in Orthopaedic Surgery (CAQ-OS), awarded by the National Commission on Certification of Physician Assistants (NCCPA) to physician assistants who already hold PA-C. It is not a replacement for initial PA certification; it is an added, specialty-level credential layered on top of it. If you want the full background, see our explainers What Is PA-COS? and What Does PA-COS Stand For?.
That distinction matters for pass-rate thinking. Unlike an entry-level licensing exam, the CAQ-OS is taken by experienced clinicians who have already cleared substantial hurdles. Any statistic about them describes a self-selected, pre-qualified group, not a general population of students. This article walks through what is and is not publicly established about outcomes, and then spends most of its time on the factors that actually determine whether you pass: the exam's structure, its weighted content categories, and the practical mechanics of registration and retakes.
What the Data Does and Does Not Show
Here is the honest position: we are not going to cite a pass-rate percentage for the Orthopaedic Surgery CAQ in this article, because we would rather leave a gap than invent a number. NCCPA's published materials for this specialty emphasize eligibility rules, the content blueprint, fees, and test-day logistics. The sources we rely on for this article (NCCPA Specialty Certificates, the CAQ FAQs, the Orthopaedic Surgery Content Blueprint, and the test-day guide) do not give us a headline first-attempt pass percentage to quote, and unsourced figures floating around the internet should be treated with suspicion.
What you can do instead is read the exam like an engineer. The format, the weighting, and the eligibility gate are all documented, and together they tell you far more about your odds than a single aggregate percentage would. For a qualitative take on difficulty, our companion piece How Hard Is the PA-COS Exam? covers what makes the questions challenging, and PA-COS Passing Score addresses how scoring is discussed.
Why Pass-Rate Comparisons Mislead Candidates
Even if a clean figure were available, three structural features of the CAQ-OS would make it a poor predictor of your personal outcome.
Everyone is pre-screened
Nobody walks into the testing center without having satisfied hard requirements: current PA-C status, unrestricted licensure, 4,000 hours of specialty experience in the preceding six years, and 75 Category I CME credits. A population that has already logged thousands of orthopaedic clinical hours behaves very differently from a population of new graduates. Comparing this exam's outcomes against a generalist entry exam would be apples to oranges.
Attempts are spread across a long window
Candidates have six years to complete initial requirements, and additional attempts within that window are permitted. A single "pass rate" can blur first-time takers, repeat takers, and people who deliberately delay testing until they feel ready. The number you care about, your own probability of passing after targeted preparation, is not the same as any cohort average.
Clinical setting changes the starting point
A PA who spends most days in a trauma service has deep familiarity with fracture and dislocation management but may be rusty on pediatric orthopaedics or bone tumors. A PA in a sports medicine or joint-replacement practice has the opposite profile. Because the exam samples across the whole specialty, your preparation should be driven by your gaps, not by an average candidate's results.
How the Exam Is Built: Format and Mechanics
The initial CAQ-OS examination is delivered at Pearson VUE test centers and consists of 120 multiple-choice questions. Those are divided into two blocks of 60 questions, each timed at 60 minutes, for two hours of actual testing. Separately, there is a 15-minute tutorial and a 15-minute break that sit outside the testing clock.
| Feature | Initial CAQ-OS Exam | Maintenance-Only Online Option |
|---|---|---|
| Format | 120 multiple-choice questions, two 60-question blocks | 120 questions, open-reference |
| Timing | 60 minutes per block; 2 hours of testing | Five minutes per question; roughly six-week completion window |
| Setting | Pearson VUE test center | Online |
| Review rules | Review limited to the active block | Not an initial-exam rule |
| Who uses it | Candidates earning the credential initially | Certificate holders maintaining it |
Do not conflate the two columns. The open-reference maintenance option is a feature of the ten-year maintenance cycle and does not apply when you are earning the credential for the first time. Many online discussions blur these rules together, which can leave an initial candidate with a dangerously relaxed idea of what test day will feel like.
NCCPA sells a separate practice examination for $50: 60 questions, 60 minutes, and 180-day access. It mirrors the length of a single block, which is useful for pacing rehearsal. However, it does not give item-by-item explanations and is not designed to predict whether you will pass. NCCPA's free sample-question critiques, by contrast, do explain their answers, so use those for learning and the practice exam for timing. Our PA-COS Study Guide shows how to combine these resources.
Where the Points Live: Blueprint Weighting
The single most actionable piece of "data" about this exam is the content blueprint. NCCPA's currently linked Content Blueprint for the Orthopaedic Surgery CAQ Examination (an undated document, which the issuer states is based on the 2023 PA Practice Analysis) lists nine Medical Content Categories with explicit weights. Our full walkthrough is in PA-COS Exam Domains: Complete Guide to All 9 Content Areas; here is the summary.
| Domain | Weight |
|---|---|
| Fractures/Dislocations | 25% |
| Soft-Tissue Injuries and Disorders | 25% |
| Joint Disorders | 20% |
| Preoperative, Postoperative, and Complication Management | 7% |
| Spine | 7% |
| Benign and Malignant Bone Tumors | 5% |
| Infectious Diseases and Connective Tissue Disorders | 5% |
| Pediatric | 4% |
| Professional, Legal, and Ethical Issues | 2% |
Three domains carry 70% of the exam. That is the key structural insight: a candidate who is genuinely strong on fractures, soft tissue, and joints has built a very large share of the passing foundation before touching anything else. Conversely, someone who spends equal time on all nine areas is under-investing where the points are densest.
Fractures/Dislocations (25%)
The largest or tied-largest domain. Expect questions that test recognition, classification, and management decisions rather than rote naming.
- Fracture pattern recognition on imaging and corresponding treatment pathways
- Dislocation reduction principles and post-reduction assessment
- Neurovascular evaluation and recognition of limb-threatening presentations
- Immobilization choices and follow-up sequencing
Soft-Tissue Injuries and Disorders (25%)
Tied with fractures at 25%. This domain rewards precise clinical examination knowledge.
- Ligament, tendon, and meniscal injury patterns and their physical examination findings
- Overuse and compressive conditions and their conservative versus operative thresholds
- Choosing the right imaging study for the suspected structure
Joint Disorders (20%)
The third pillar, spanning degenerative and inflammatory joint presentations and the decision points around them.
- Distinguishing degenerative from inflammatory or infectious joint presentations
- Non-operative management ladders and indications for arthroplasty referral
- Imaging and laboratory interpretation in the joint workup
The blueprint also classifies the same questions by task, and these categories overlap with the content domains rather than adding to them. Think of it as a second lens on identical items:
- History Taking and Performing Physical Examination: 20%
- Ordering and Interpreting Diagnostic and Laboratory Studies: 20%
- Formulating Most Likely Diagnosis: 25%
- Patient Education and Preventive Measures: 5%
- Treatment/Intervention: 25%
- Applying Scientific Concepts: 3%
- Professional, Legal, and Ethical Issues: 2%
Notice that diagnosis and treatment together account for half the task weighting. The exam is less about reciting facts and more about decision-making: given this presentation, what is the most likely diagnosis, and what is the appropriate next intervention? Practice questions that force you to commit to a diagnosis and a next step will serve you better than flashcards of definitions.
Key Takeaway
Rank your study hours by weight, then adjust for personal weakness. A 5% domain you know nothing about is worth less than moving from "adequate" to "strong" in a 25% domain, but ignoring a weak small domain entirely still forfeits easy points.
The Eligibility Filter: Who Actually Sits the Exam
The strongest quiet determinant of outcomes is the gate in front of the exam. To be eligible you must hold a current PA-C, maintain unrestricted PA licensure in a US jurisdiction or territory (or unrestricted government practice privileges), and ensure every license you hold is unrestricted. On the experience side, NCCPA requires 4,000 hours of specialty practice within the preceding six years, plus 75 Category I CME credits in six years, with 25 of those in the preceding two years. ACLS is recommended but not mandatory.
There is also an attestation step. A specialty physician, a lead or senior PA, or a physician or PA postgraduate program director who is familiar with your work must attest to your relevant procedures and patient-case experience, and that attestation is due within 90 days of your score report. Line up your attester early so a missed deadline does not undercut an otherwise successful result. Full details are in PA-COS Requirements: Eligibility, Prerequisites & How to Qualify.
The takeaway for pass-rate thinking: by the time you register, you have documented thousands of hours in orthopaedics. The exam is testing breadth and judgment across the whole specialty, so the typical failure mode is not a lack of clinical competence but uneven coverage, where a candidate is deep in their daily niche and thin everywhere else.
Retake Economics and the Six-Year Window
Cost shapes how people approach a high-stakes exam, so here are the documented mechanics. The initial fee totals $350: a $100 program registration plus a $250 examination fee. You have six years to complete the initial requirements, and if you need another examination attempt within that period, it costs $250. A full cost analysis is in PA-COS Certification Cost: Complete Pricing Breakdown.
| Item | Amount |
|---|---|
| Program registration | $100 |
| Examination | $250 |
| Initial total | $350 |
| Additional attempt within the six-year window | $250 |
| Optional NCCPA practice exam | $50 (60 questions, 60 minutes, 180-day access) |
The registration fee is paid once, so a retake does not repeat it. That softens the financial downside of a first-attempt miss, but it does not make a casual first attempt wise: your time, a testing-center appointment, and the preparation effort are the real costs. The six-year runway is best used for deliberate readiness, not for repeated "test the waters" attempts. Timing and scheduling specifics are covered in PA-COS Exam Dates.
Once earned, the credential is valid for ten years. Maintaining it requires keeping PA-C and unrestricted licensure, earning 125 specialty Category I CME credits during the cycle, and passing a maintenance examination, which is where the open-reference online option applies. If you are weighing the long-term picture, see Is the PA-COS Certification Worth It? and the career-oriented PA-COS Jobs overview.
A Blueprint-Driven Prep Sequence
Rather than a generic schedule, sequence your preparation around the blueprint weights. This is the only time-management section in the article, so it stays tied to the exam's actual structure. Adjust the order if your clinical background makes a different starting point more sensible.
Fractures/Dislocations (25%)
- Review classification and management pathways for major fracture and dislocation patterns
- Drill neurovascular assessment and limb-threatening presentations
- Work NCCPA's free critiques for this domain and read each explanation
Soft-Tissue Injuries and Disorders (25%)
- Rebuild physical examination findings for ligament, tendon, and meniscal injuries
- Practice choosing the appropriate imaging study for each suspected structure
- Review conservative-versus-operative decision thresholds
Joint Disorders (20%) and Spine (7%)
- Separate degenerative, inflammatory, and infectious joint presentations
- Cover non-operative ladders and arthroplasty indications
- Add spine presentations and red-flag recognition
The Smaller Domains
- Preoperative, postoperative, and complication management (7%)
- Bone tumors (5%), infectious disease and connective tissue disorders (5%), pediatric (4%)
- A brief pass through professional, legal, and ethical issues (2%)
Timed Rehearsal
- Take the $50 NCCPA practice exam as a 60-minute pacing drill
- Re-study any domain where your decisions, not your recall, broke down
- Rehearse the no-going-back rule for each 60-question block
For a compact last-week reference, pair this plan with the PA-COS Cheat Sheet. For high-volume scenario questions that mimic the diagnose-then-treat style described above, our PA-COS practice test platform is built around exactly that decision-making format, and you can start with the free questions at the main practice site.
Frequently Asked Questions
The NCCPA materials we reviewed for this specialty do not publish a headline first-attempt percentage that we can responsibly quote, so this article does not give one. Be skeptical of unsourced figures, especially because other credentials use the same "PA-COS" acronym. Check NCCPA's specialty certificate pages directly for any updates.
The initial exam has 120 multiple-choice questions split into two 60-question blocks of 60 minutes each. A separate 15-minute tutorial and 15-minute break sit outside the two hours of testing, and review is limited to the block you are currently in.
Fractures/Dislocations and Soft-Tissue Injuries and Disorders are 25% each, and Joint Disorders is 20%, so those three represent 70% of the blueprint. Prioritize them, then cover Preoperative, Postoperative, and Complication Management and Spine at 7% each, followed by the smaller domains. See our domains guide for detail.
You have six years to complete the initial requirements, and another examination attempt within that period costs $250. The $100 program registration fee is part of the initial $350 total and is not described as repeating for a retake, though you should confirm current terms with NCCPA before scheduling.
No. The open-reference, 120-question online option with five minutes per question and roughly a six-week window is for maintenance of the credential, not the initial exam. The initial exam is a proctored, closed-format test at a Pearson VUE center.
In the end, the question "what is the pass rate?" matters less than "how well does my preparation match the blueprint?" Focus on the three heavyweight domains, rehearse the two-block pacing, and confirm your eligibility paperwork early. For a broader orientation to the credential, start with PA-COS Certification and then return to the PA-COS Study Guide to build your plan.