CPO Study Guide 2026

Everything you need to pass the CPO exam in one place: the exam format, every topic to study, real practice questions with explanations, flashcards, and full-length practice tests. Free, no sign-up needed.

CPO exam key facts

The ABC Prosthetist Orthotist Written Exam has 200 multiple-choice questions on patient management. Source
The ABC dual-discipline Prosthetist Orthotist Simulation Exam is a four-hour interactive exam with nine simulated case scenarios. Source
ABC gives approved practitioner candidates three years or four attempts per exam; from January 1, 2027, candidates get two eligibility windows and eight attempts, then must complete remediation before a final three-year or four-attempt period. Source
ABC certification for a Certified Prosthetist Orthotist runs on a five-year cycle in which continuing education credits must be earned and an annual fee paid. Source

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📋 CPO Exam Format at a Glance

200

Questions

240 min

Time Limit

70%

Passing Score

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📚 CPO Topics to Study (37)

Clinical Application & Fitting · 9 cards Patient Evaluation · 9 cards Patient Management & Follow-Up · 9 cards Prosthetic & Orthotic Design & Fabrication · 9 cards Clinical Application & Fitting · 7 cards Clinical Application & Fitting · 7 cards Clinical Application & Fitting · 7 cards Clinical Application & Fitting · 7 cards Documentation, Coding & Reimbursement · 7 cards Documentation, Coding & Reimbursement · 7 cards Documentation, Coding & Reimbursement · 7 cards Patient Evaluation · 7 cards Patient Evaluation · 7 cards Patient Evaluation · 7 cards Patient Evaluation · 7 cards Patient Management & Follow-Up · 7 cards Patient Management & Follow-Up · 7 cards Patient Management & Follow-Up · 7 cards Patient Management & Follow-Up · 7 cards Prosthetic & Orthotic Design & Fabrication · 7 cards Prosthetic & Orthotic Design & Fabrication · 7 cards Prosthetic & Orthotic Design & Fabrication · 7 cards Prosthetic & Orthotic Design & Fabrication · 7 cards Communication & Interprofessional Collaboration · 6 cards Communication & Interprofessional Collaboration · 6 cards CPO Biomechanics & Gait Analysis · 6 cards CPO Biomechanics & Gait Analysis · 6 cards CPO Biomechanics & Gait Analysis · 6 cards CPO Materials Science & Technology · 6 cards CPO Materials Science & Technology · 6 cards

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✍️ Sample CPO Questions & Answers

1. Under what circumstances can a Medicare replacement prosthesis be billed prior to the standard 5-year replacement cycle?

✓ When the device is lost, stolen, irreparably damaged, or the patient's condition has significantly changed

Medicare allows early replacement when a device is lost, stolen, or irreparably damaged, or when a documented change in the patient's condition renders the existing device ineffective.

2. In carbon fiber laminate fabrication, the direction of fiber orientation most critical for maximizing longitudinal stiffness in a pylon is:

✓ 0° (parallel to long axis)

Fibers oriented at 0° (parallel to the long axis) bear axial loads most efficiently, maximizing longitudinal stiffness.

3. When implementing communication & interprofessional collaboration practices, what should a CPO professional prioritize first?

✓ Compliance with established standards and protocols

Compliance with established standards and protocols must be the first priority, as it ensures safety, quality, and legal adherence in professional practice.

4. What is 'balance billing' in the context of O&P reimbursement, and how does it apply to Medicare-participating providers?

✓ Billing the patient for the difference between the provider's charge and the insurance payment, which is restricted for Medicare participants

Balance billing is charging a patient the difference between a provider's fee and the insurer's allowed amount; Medicare-participating providers agree not to exceed the Medicare-approved amount.

5. A scoliosis patient with a 30° Cobb angle (skeletally immature) is prescribed a TLSO. The orthosis should be worn approximately:

✓ 16-23 hours per day

Evidence supports 16-23 hours per day of TLSO wear to achieve effective curve correction in skeletally immature patients with curves of 25-45°.

6. How does continuing education relate to evidence-based practice & research methods for CPO certified professionals?

✓ It ensures professionals stay current with evolving standards and best practices

Continuing education ensures CPO professionals stay current with evolving standards, technologies, and best practices in evidence-based practice & research methods, maintaining competency throughout their careers.

🎯 Free CPO Practice Tests

Patient Evaluation · 9 questions Patient Management & Follow-Up · 9 questions Prosthetic & Orthotic Design & Fabrication · 9 questions Clinical Application & Fitting · 9 questions Prosthetic & Orthotic Design & Fabrication · 7 questions Documentation, Coding & Reimbursement · 7 questions Prosthetic & Orthotic Design & Fabrication · 7 questions Clinical Application & Fitting · 7 questions Clinical Application & Fitting · 7 questions Documentation, Coding & Reimbursement · 7 questions

📖 CPO Guides & Articles

Your CPO Study Path

1. Learn with Flashcards → 2. Drill Practice Tests → 3. Take the Full Exam Simulation

🃏 CPO Flashcards (253)🏆 CPO Exam Simulation

What Practice Test Geeks adds beyond an AI chat for CPO

An AI chatbot can quiz you, but it can't reproduce the exam conditions or keep your record. Here you get:

A timed, full-length CPO mock exam — 200 questions in 240 minutes with a 70% pass mark, modeled on the official exam's question count and time limit, followed by a score report broken down by exam domain.
A fixed CPO question bank: the same test every attempt, so your score is comparable from one try to the next instead of changing with every regenerated quiz.
Progress saved on your device: completed tests, scores and missed questions stay in My Progress, so you can retake only what you got wrong.
A printable CPO cheat sheet you can print or save as a PDF.
CPO flashcards built from the same question bank.
Free CPO practice tests with the correct answer shown after each question.

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How this page was made: written with AI tools. Exam facts are checked against the official sources listed below. Not reviewed by a subject-matter expert. Editorial policy

Sources & references

Exam facts on this page (fees, format, dates, passing scores) are checked against these official sources; the date is our last check. Editorial policy

abcop.org — Test delivery, exam format, time limit, eligibility, renewal, retake policy, score release, score validity, late registration, registration deadline · verified Oct 2026