ABC CPO
ABC Certified Prosthetist-Orthotist (CPO)
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Cheat sheet
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ExploreKey terms
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ExploreStudy plan
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ExploreCommon mistakes
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ExploreCase studies
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ExploreExam-day guide
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ExploreAbout this exam
The Certified Prosthetist-Orthotist (CPO) credential is issued by the American Board for Certification in Orthotics, Prosthetics & Pedorthics (ABC), the national certifying and accrediting body for the orthotic, prosthetic and pedorthic professions. ABC states that "Since 1948, ABC has set the quality standards for the orthotic, prosthetic and pedorthic professions and today represents the highest ideals in the profession." The CPO designation is intended for clinicians who practice across both disciplines - fabricating and fitting prostheses for people with limb loss or difference, and orthoses for people who need support, alignment, or protection of the musculoskeletal system. Because a CPO is certified in both areas, exam preparation must be balanced: this study set is organized as a 50/50 split between Prosthetics and Orthotics, and candidates should expect to move fluidly between the two domains rather than mastering one and coasting on the other. Preparation should combine structured content review with device-specific decision making: patient evaluation and measurement, design and component selection, casting and modification, alignment, fitting, gait and functional assessment, follow-up, and documentation. Candidates should also be ready for ethics, professionalism, and patient-safety scenarios, since ABC maintains a Code of Professional Responsibility and a sanctions process. Verify all current exam logistics - format, item count, timing, fees, and scheduling - directly with ABC before you register, as those details are not published on the pages reviewed here.
What you'll study
About ABC CPO preparation
Who issues the CPO credential, and what does it cover?
The American Board for Certification in Orthotics, Prosthetics & Pedorthics (ABC) issues the CPO credential. It covers both prosthetics and orthotics practice, so preparation must address limb prostheses and orthoses, including evaluation, design, fitting, alignment, and follow-up. Confirm current requirements with ABC.
Is the exam split evenly between prosthetics and orthotics?
This study set is organized as a 50/50 split between the Prosthetics and Orthotics domains. Treat that as a study-planning framework rather than an official blueprint figure, and verify the published domain weighting with ABC before you build a final study schedule.
How many questions are on the exam, and how long do I have?
Those details are not stated in the ABC material reviewed here, so no item count or time limit is given. Do not rely on figures from older prep materials. Check ABC's exam dates and deadlines page and your candidate handbook for the current format and timing.
What score do I need to pass, and what does the exam cost?
Neither the passing score nor the exam fee is published in the source material reviewed here, so neither is stated. Both are set by ABC and can change between exam cycles. Confirm the current passing standard and fee directly with ABC before registering.
If I fail, can I retake the exam, and how soon?
ABC's retake policy, waiting period, and any associated fees are not stated in the material reviewed here. Candidates should not assume a specific waiting period. Contact ABC directly to confirm retake eligibility, timing, and cost before you sit for the exam.
How long is the certification valid, and what keeps it active?
The validity period is not stated in the source reviewed here. ABC maintains dedicated pages for remaining certified, finding CEUs, and paying the annual fee, and its calendar lists a December 1 annual fee due date for all credential holders. Confirm your specific renewal requirements with ABC.
Which domain should I study first?
Start with the domain you practice less. Because the credential spans both disciplines, a clinician who works mostly in prosthetics typically needs more orthotics review, and vice versa. Front-load the weaker domain, then alternate between the two so neither goes stale before exam day.
What are the most common ways candidates lose points?
Typical failure modes are one-sided preparation, memorizing component names without knowing when each is indicated, and skipping the clinical reasoning steps of evaluation, cast modification, and alignment. Weak documentation and ethics judgment also cost points. Practice justifying each decision, not just naming the device.
How should I prepare in the final weeks?
Shift from reading to retrieval. Work mixed sets that alternate prosthetics and orthotics so you practice switching contexts, then review every missed item down to the underlying principle. Rehearse patient-evaluation and device-selection scenarios aloud, and confirm exam-day logistics with ABC in advance.
Is this study platform affiliated with ABC?
No. This is independent study material and is not affiliated with, endorsed by, or sponsored by ABC. Always treat ABC's own published candidate materials as the authoritative source for eligibility, exam content, scheduling, fees, and certification maintenance requirements.