OCS study guide

How to study for the OCS

Everything you need to know about the exam, plus how I would spend your study time. Exam facts on this page come from the American Board of Physical Therapy Specialties (ABPTS). Always confirm dates and fees on the ABPTS orthopaedics page before you apply.

The exam at a glance

• Each question has four or five answer choices and one best answer.
• There is no penalty for a wrong answer, so answer every question.
• Questions stand alone or come as a case series that shares one patient.
• Once you submit a block, you cannot go back to it, and unused time does not carry over.
• It is computer based at PSI testing centers.

What is on it

ABPTS publishes an approximate breakdown by body region. Four regions make up over half the exam.

By domain, patient management (examination, evaluation, diagnosis, prognosis, intervention and outcomes) is about 60%, knowledge for specialty practice about 30%, and clinical reasoning, professionalism, communication, education and systems based practice about 2% each.

Source: ABPTS orthopaedics exam outline. ABPTS notes the actual distribution only approximates these numbers.

Free questions by region: Lumbar spine Shoulder Knee Cervical spine Hip Foot and ankle All free questions

Who can sit for it

• A current, unrestricted license to practice physical therapy in the United States.
• Clinical hours route (ABPTS Option A): 2,000 hours of direct patient care in orthopaedics within the last 10 years, with at least 300 of those hours in the last 3 years.
• Residency route (Option B): completion of an ABPTRFE accredited orthopaedic residency. Current residents may be approved to sit for the exam conditionally.

For the 2027 exam cycle, clinical hours route hours follow a body region breakdown: 750 spine, 500 upper quarter, 500 lower quarter and 250 of your choice. Observed or mentored hours under a certified orthopaedic clinical specialist count hour for hour. See the ABPTS requirements page for details.

Spring 2027 dates and fees

Source: 2026 ABPTS candidate guide.

How I would study

High yield topics people underestimate

These come up on the OCS more than most people expect, and they are easy points once you know the pattern.

Research and statistics

Concept	What to know
SnNout and SpPin	A highly sensitive test that is negative rules a condition out. A highly specific test that is positive rules it in.
Likelihood ratios	LR+ = sensitivity / (1 minus specificity). LR minus = (1 minus sensitivity) / specificity. LR+ over 10 or LR minus under 0.1 shifts probability a lot.
Post test probability	Convert to odds, multiply by the LR, convert back. A 5% pretest probability with an LR+ of 15.5 gives about 45%.
ARR, RRR and NNT	If 15% of controls and 10% of treated patients have the outcome, ARR is 5%, RRR is 33% and NNT is 1 / 0.05 = 20.
MCID	For the Oswestry, about 10 points or a 30% change. A statistically significant result can still be below the MCID.
Reliability	Kappa for categorical findings (positive or negative test). ICC for continuous measures like ROM.
Hawthorne effect	People change because they know they are being studied. It acts on both groups.
John Henry effect	The control group works harder to keep up with the treatment group.
Pygmalion effect	The investigator’s or clinician’s expectations change the outcome. Blinding is the fix.

Low back pain: course and classification

• Persistent pain still recovers. In an inception cohort with LBP lasting 3 months, about 41% fully recovered by 12 months (Costa, BMJ 2009).
• Recurrence is the rule. About 69% recur within a year; more than 2 prior episodes and sitting over 5 hours a day add risk (da Silva, J Physiother 2019).
• Revised treatment based classification. Three approaches chosen from current pain, disability and irritability: symptom modulation (high), movement control (moderate and stable) and function optimization (low). Patients move between them, including back to symptom modulation during a flare (Alrwaily, Phys Ther 2016).

Shoulder: STAR classification, calcific tendinopathy and Parsonage Turner

• STAR Shoulder. Classify the diagnostic category, then dose by irritability. High irritability (pain 7/10 or more, night and rest pain, active motion well short of passive) gets low physical stress; low irritability gets heavier loading. Apprehension on instability testing points away from subacromial pain syndrome, and atraumatic full thickness cuff tears sit within subacromial pain syndrome with rehab first.
• Calcific tendinopathy. The resorptive phase is often the most painful, lasts about 3 weeks to 6 months and usually ends in relief.
• Parsonage Turner (neuralgic amyotrophy). Severe pain first, then weakness, often of the serratus. Recovery is slower than people expect; scapular motor relearning and self management help.

Thoracic outlet syndrome

• Most cases are neurogenic and managed conservatively: education, activity and posture changes, scapular and scalene work, nerve gliding.
• Provocative tests have limited specificity. Pulse changes are common in healthy people; reproduction of the patient’s own symptoms on 2 or more tests matters more.
• Venous TOS is urgent. Arm swelling, cyanosis and heaviness after heavy overhead use suggest effort thrombosis (Paget Schroetter syndrome) and needs same day referral.

Knee: ACL copers, OA and TKA

• Potential coper screen. Timed hop index at least 80%, KOS ADLS at least 80%, global rating at least 60% and no more than 1 giving way episode. The noncoper label predicts poorly: in one cohort, 70% of noncopers treated with rehab were copers at 1 year (Moksnes 2008).
• Knee OA is a clinical diagnosis. ACR clinical criteria: knee pain plus 3 of 6 findings (age over 50, stiffness under 30 minutes, crepitus, bony tenderness, bony enlargement, no warmth). Exercise can start without imaging.
• TKA. Preoperative exercise and education are recommended. Early swelling: cryotherapy with the limb elevated. No routine CPM after primary TKA (Jette 2020; Bove 2026).

Arthritis types and when to refer

Condition	Clues
Rheumatoid arthritis	Symmetric small joint swelling, ulnar drift at the MCPs, swan neck deformity. Joint protection plus tailored hand exercise.
Axial spondyloarthritis	Back pain 3 months or longer starting before 45, better with exercise not rest, marked relief within 48 hours of a full NSAID dose. Normal radiographs do not exclude it. Refer to rheumatology.
Gout	Sudden red, hot, swollen joint, often the first MTP or ankle. With fever, same day aspiration to rule out septic arthritis.
Reactive arthritis	Asymmetric lower limb arthritis weeks after a GI or GU infection, with enthesitis or conjunctivitis. Refer.

Exam day checklist

• Arrive at least 30 minutes early. Arriving more than 30 minutes late means you will not be admitted.
• Bring an unexpired government photo ID with a signature. Your name must match your scheduling information exactly.
• Leave your phone, watch and jewelry in your locker. Wedding and engagement rings are fine.
• Noise reducing headphones are provided, or bring your own soft foam earplugs.
• Check the route, parking and travel time the night before.

Source: ABPTS exam day guidance.

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