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Free COC Practice Questions

10 free, exam-style Certified Outpatient Coder (COC) practice questions with answers and explanations. No signup required. Work through them below, then take the full free COC practice test to study every exam domain.

Question 1

An ED patient documented as "chest pain, rule out MI" is coded with:

  1. The acute MI code I21.x
  2. Code Z03.89 observation suspected
  3. Code R69 unknown morbidity cause
  4. Chest pain code R07.9
Show answer & explanation

Correct answer: D - Chest pain code R07.9

Question 2

Medicare hospital outpatient clinic visits are reported using which code?

  1. A code from 99201 to 99215
  2. Code G0463 (single level)
  3. A code from 99202 to 99205
  4. Code G0438 wellness visit
Show answer & explanation

Correct answer: B - Code G0463 (single level)

Question 3

A patient is seen twice in the ED on the same date in the same revenue center for two unrelated conditions. The second ED E/M is reported with:

  1. Modifier 25 appended only
  2. Modifier 27 appended only
  3. Modifier 27 + Condition Code G0
  4. Modifier 59 appended only
Show answer & explanation

Correct answer: C - Modifier 27 + Condition Code G0

Question 4

On hospital outpatient/ASC claims, when a procedure is discontinued BEFORE administration of anesthesia, the coder appends:

  1. Modifier 73 discontinued
  2. Modifier 53 discontinued
  3. Modifier 74 discontinued
  4. Modifier 52 reduced
Show answer & explanation

Correct answer: A - Modifier 73 discontinued

Question 5

When modifier 50 (bilateral) is appended to a procedure that has Status Indicator J1, the impact on reimbursement is:

  1. Doubles the payment rate
  2. Reduces payment by half
  3. Triggers separate APC line
  4. Does not increase payment
Show answer & explanation

Correct answer: D - Does not increase payment

Question 6

Within a single drug administration class, which method takes priority?

  1. Injection ranks highest priority
  2. IV push ranks highest priority
  3. Infusion ranks highest priority
  4. All methods rank equally always
Show answer & explanation

Correct answer: C - Infusion ranks highest priority

Question 7

A patient receives chemotherapy IV infusion (3 hours of one drug) and then receives 1 hour of IV hydration after the chemo completes. Which is the "initial" service?

  1. Hydration code 96360 used
  2. Therapeutic 96365 used
  3. Chemotherapy 96413 used
  4. IV push code 96374 used
Show answer & explanation

Correct answer: C - Chemotherapy 96413 used

Question 8

After administering a single-dose vial of medication with no waste, the hospital must append which modifier per Medicare effective 10/1/2023?

  1. Modifier JW required here
  2. Modifier JZ required here
  3. Modifier KX required here
  4. Modifier JG required here
Show answer & explanation

Correct answer: B - Modifier JZ required here

Question 9

How long does pass-through status under OPPS typically last for an approved drug or device?

  1. Two to three years
  2. One to two years
  3. Five to seven years
  4. Indefinitely permanent
Show answer & explanation

Correct answer: A - Two to three years

Question 10

Under HIPAA, the acronym TPO refers to permitted disclosures for:

  1. Therapy, prevention, and outcomes
  2. Treatment, prescriptions, ordering
  3. Treatment, payment, operations
  4. Triage, processing, oversight
Show answer & explanation

Correct answer: C - Treatment, payment, operations

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