100+ Free COF Practice Questions

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During an initial patient evaluation, which assessment should be performed FIRST before selecting a prefabricated orthotic device?

Measure the patient for device sizing

Obtain a comprehensive patient history and physical assessment

Select the appropriate device from the catalog

Contact the insurance company for prior authorization

to track

2026 Statistics

Key Facts: COF Exam

125

Total Items

ABC Fitter Candidate Guide

2.5h

Exam Time

ABC Orthotic Fitter Exam Page

$370

Total Cost

ABC Fees Page ($160 + $210)

Content Domains

ABC Test Content Outline

6x/year

Testing Cycles

ABC Exam Dates

1,000 hrs

Experience Required

ABC Eligibility (Pathway 1)

CFo

Credential Awarded

ABC Certification

The ABC orthotic fitter exam consists of 125 multiple-choice items administered in 2.5 hours via computer-based testing at 350+ locations nationwide or online with a live remote proctor. Exams are offered every other month. Eligibility requires a high school diploma or GED, completion of an ABC-approved pre-certification course, and 1,000 hours of orthotic fitting experience (or 500 hours with a related allied health credential).

Sample COF Practice Questions

Try these sample questions to test your COF exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1During an initial patient evaluation, which assessment should be performed FIRST before selecting a prefabricated orthotic device?

A.Measure the patient for device sizing

B.Obtain a comprehensive patient history and physical assessment

C.Select the appropriate device from the catalog

D.Contact the insurance company for prior authorization

Explanation: A comprehensive patient history and physical assessment must be performed before any device selection or fitting. This includes understanding the patient's diagnosis, functional limitations, lifestyle needs, and any contraindications. Sizing, device selection, and insurance authorization all come after the initial evaluation is complete.

2A patient presents with a physician's prescription for a knee orthosis following ACL reconstruction. Which of the following is the MOST important factor to assess during the initial evaluation?

A.The patient's insurance coverage limits

B.The patient's current range of motion and weight-bearing status

C.The brand preference of the referring physician

D.The color preference of the patient

Explanation: Following ACL reconstruction, assessing the patient's current range of motion and weight-bearing status is critical for selecting the appropriate knee orthosis and setting it to the correct parameters. Range of motion restrictions and weight-bearing limitations directly affect which device is appropriate and how it should be configured. Insurance, brand preferences, and cosmetic choices are secondary considerations.

3When evaluating a patient's skin integrity before fitting an orthotic device, which finding would be a contraindication to immediate fitting?

A.Mild callus formation on the foot

B.Open wound or skin breakdown in the area where the device will contact

C.Previous surgical scars that are fully healed

D.Slight discoloration from a resolved bruise

Explanation: An open wound or skin breakdown in the area of device contact is a contraindication to immediate fitting because the device could worsen the wound, introduce infection, or impede healing. The fitter should consult with the prescribing physician before proceeding. Calluses, healed scars, and resolved bruises do not typically prevent device fitting.

4Which anatomical landmark is MOST important when measuring a patient for a lumbosacral orthosis (LSO)?

A.The acromion process of the shoulder

B.The distance from the xiphoid process to the symphysis pubis

C.The circumference of the thigh

D.The length of the forearm

Explanation: When fitting a lumbosacral orthosis, the distance from the xiphoid process (lower sternum) to the symphysis pubis (front of the pelvis) is essential for determining the correct anterior panel height. This measurement ensures the device provides appropriate trunk support without restricting breathing or hip flexion. Shoulder, thigh, and forearm measurements are not relevant to LSO fitting.

5A certified orthotic fitter is evaluating a diabetic patient for a prefabricated ankle-foot orthosis. Which additional assessment is MOST critical for this patient population?

A.Checking the patient's blood pressure

B.Performing a thorough sensory and vascular assessment of the feet

C.Measuring the patient's body mass index

D.Assessing the patient's visual acuity

Explanation: Diabetic patients are at high risk for peripheral neuropathy and peripheral vascular disease, which can lead to decreased sensation and poor circulation in the feet. A thorough sensory and vascular assessment is critical because these patients may not feel pressure points or skin breakdown from the device. Without adequate sensation, tissue damage can progress undetected.

6When assessing gait in a patient who has been prescribed a prefabricated AFO, which gait deviation indicates the need for a device that controls ankle dorsiflexion?

A.Excessive knee hyperextension during stance phase

B.Foot drop during swing phase

C.Excessive hip hiking during swing phase

D.Trunk lateral lean during stance phase

Explanation: Foot drop during the swing phase indicates weakness of the ankle dorsiflexors (primarily the tibialis anterior muscle), which is the primary indication for an AFO that controls dorsiflexion. An AFO that holds the ankle in a neutral or slightly dorsiflexed position prevents the foot from dropping and dragging during swing phase. The other gait deviations may have different underlying causes.

7During a patient evaluation, the fitter observes significant edema in the patient's lower extremity. What is the BEST course of action?

A.Fit the device immediately using the largest available size

B.Document the edema and consult with the prescribing physician before fitting

C.Apply a compression bandage and fit the device over it

D.Refuse to see the patient and reschedule for another day

Explanation: Significant edema can affect device fit and may indicate an underlying medical condition that requires physician attention. The fitter should document the findings and consult with the prescribing physician to determine whether fitting should proceed, be delayed, or if the treatment plan should be modified. Fitting over edema without physician guidance can lead to poor fit as edema fluctuates.

8Which of the following measurements is essential when fitting a patient for a prefabricated cervical collar?

A.Head circumference only

B.Neck circumference and the distance from the chin to the sternal notch

C.Shoulder width and arm length

D.Chest circumference and waist circumference

Explanation: Proper fitting of a cervical collar requires measuring the neck circumference for the correct collar diameter and the distance from the chin to the sternal notch (mandible to sternum) for the correct collar height. These measurements ensure the collar provides adequate support and immobilization without being too tight or positioned incorrectly.

9A patient reports numbness and tingling in their fingers while wearing a wrist orthosis. During evaluation, what is the MOST likely cause?

A.The orthosis is too loose

B.The orthosis is compressing a nerve or blood vessel

C.The patient is allergic to the device material

D.The patient needs a larger wrist orthosis

Explanation: Numbness and tingling (paresthesia) are classic symptoms of nerve or vascular compression. A wrist orthosis that is too tight or improperly positioned can compress the median nerve in the carpal tunnel area or restrict blood flow, causing these symptoms. The fitter should immediately loosen or adjust the device and reassess.

10When evaluating a pediatric patient for an orthotic device, which factor is MOST unique to this population compared to adults?

A.Pediatric patients always require custom-molded devices

B.Growth potential requires planning for frequent device changes or adjustable designs

C.Children cannot provide any input about comfort or fit

D.Pediatric orthotics do not require a physician's prescription

Explanation: The most unique factor in pediatric orthotic fitting is growth potential. Children's bodies are continuously growing, which means devices will need to be replaced or adjusted more frequently than for adult patients. Adjustable designs that can accommodate growth help extend the useful life of the device. Prefabricated devices can be appropriate for children, children can often communicate about comfort, and prescriptions are still required.

About the COF Exam

The ABC Certified Orthotic Fitter (CFo) exam is a 125-item multiple-choice test covering 5 domains: Patient Evaluation (30%), Formulation of the Treatment Plan (18%), Implementation of the Treatment Plan (30%), Continuation of the Treatment Plan (8%), and Practice Management (14%). The exam assesses knowledge of basic anatomy, prefabricated orthotic devices, fitting criteria, ethics, and professionalism.

Questions

125 scored questions

Time Limit

2.5 hours

Passing Score

Criterion-referenced (set by ABC; reviewed biennially)

Exam Fee

$370 ($160 application + $210 exam) (ABC (American Board for Certification in Orthotics, Prosthetics & Pedorthics))

COF Exam Content Outline

30%

Patient Evaluation

Review prescriptions and referrals, take patient history, perform clinical assessments, consult with healthcare professionals, communicate treatment plans, and refer patients when appropriate

18%

Formulation of the Treatment Plan

Formulate treatment goals and outcomes, determine appropriate device design and materials, consult with physicians, develop patient education and follow-up plans, and inform patients of financial responsibilities

30%

Implementation of the Treatment Plan

Take measurements, consult manufacturer guidelines, fit and assess device function in sagittal, transverse, and coronal planes, ensure proper fit and alignment, and educate patients on device use and care

Continuation of the Treatment Plan

Provide periodic follow-up care, assess ongoing patient needs, evaluate device fit and function, make adjustments and modifications, and document patient progress

14%

Practice Management

Facilities management, environmental safety compliance, HIPAA regulations, accreditation standards, quality care policies, record-keeping, and insurance/billing procedures

How to Pass the COF Exam

What You Need to Know

Passing score: Criterion-referenced (set by ABC; reviewed biennially)
Exam length: 125 questions
Time limit: 2.5 hours
Exam fee: $370 ($160 application + $210 exam)

Keys to Passing

Complete 500+ practice questions
Score 80%+ consistently before scheduling
Focus on highest-weighted sections
Use our AI tutor for tough concepts

COF Study Tips from Top Performers

1Focus heavily on Patient Evaluation (30%) and Implementation of the Treatment Plan (30%) — together they make up 60% of the exam

2Study basic anatomy of the spine, upper extremity, and lower extremity as it relates to orthotic device fitting

3Master the different types of prefabricated orthoses: cervical, spinal, upper extremity, lower extremity, and foot orthoses

4Learn manufacturer guidelines for measuring, fitting, and adjusting common orthotic devices

5Review HIPAA compliance, OSHA safety regulations, and accreditation standards for the Practice Management domain

6Practice clinical scenarios involving patient assessment, device selection, and follow-up care to prepare for application-level questions

Frequently Asked Questions

What is the ABC Certified Orthotic Fitter (COF) exam?

The COF exam is a 125-item multiple-choice certification exam administered by the American Board for Certification in Orthotics, Prosthetics & Pedorthics (ABC). Passing earns the Certified Fitter-orthotics (CFo) credential, qualifying you to fit prefabricated and custom-fitted orthotic devices.

How many questions are on the ABC orthotic fitter exam?

The ABC orthotic fitter exam contains 125 multiple-choice questions. You have 2.5 hours to complete the exam. The exam is computer-based and offered at 350+ test center locations or online with a live remote proctor.

What is the passing score for the orthotic fitter exam?

The passing score is criterion-referenced and set by ABC using psychometric methods. The exact cut score is not publicly disclosed and is reviewed and revised biennially to ensure validity.

What are the eligibility requirements for the COF exam?

Pathway 1: High school diploma/GED, completion of an ABC-approved orthotic fitter pre-certification course, and 1,000 hours of orthotic fitting experience under supervision. Pathway 2: Same education requirements but only 500 hours of experience if you hold a nationally recognized certification in a related allied health profession (e.g., Athletic Trainer, PTA, OTA, Medical Assistant).

How much does the orthotic fitter certification cost?

The application fee is $160 (non-refundable) and the exam fee is $210, totaling $370. Late applications incur an additional $100 fee. Annual renewal after certification is $150, prorated for the first year.

When is the orthotic fitter exam offered?

The ABC orthotic fitter exam is offered every other month in six testing cycles per year. Exams are administered via computer-based testing at 350+ locations nationwide or online with a live remote proctor. Application deadlines are approximately two months before each cycle.

What credential do you earn after passing the orthotic fitter exam?

After passing the ABC orthotic fitter exam and meeting all eligibility requirements, you are awarded the Certified Fitter-orthotics (CFo) credential. This credential must be maintained through annual renewal and continuing education.

What is the scope of practice for a Certified Orthotic Fitter?

A Certified Fitter-orthotics (CFo) is competent to fit prefabricated, custom-fitted, and off-the-shelf orthoses. The scope includes patient assessment, formulation of a treatment plan, implementation of the treatment plan, follow-up care, and practice management. Orthotic fitters work under supervision and refer complex cases to certified orthotists.