1.2 Exam Day, Format, and Approved Code Books

Exam Day, Format, and Approved Code Books

Quick Answer: Bring (or open in the platform) AAPC-approved books 1, 2, and 4: American Medical Association (AMA) CPT Professional Edition, ICD-10-CM (any publisher), and HCPCS Level II (any publisher). Preceding-year books are allowed, but only one copy of each. AAPC provides an on-screen calculator; physical calculators and devices with an on/off switch are not allowed.

Why exam-day rules are scoring rules

The Certified Outpatient Coder (COC) exam from the American Academy of Professional Coders (AAPC) is an open-code-book test. That is not the same as an open-notes, open-phone, or open-encoder test. AAPC's Taking the COC exam page and approved-code-books chart define which books you may use, how you may mark them, and which tools live inside the electronic platform. A tab that earmarks the CPT integumentary guidelines is allowed. A tablet running an encoder is a disqualification risk. If you cannot find a parenthetical CPT note in 30 seconds, the published 2.4-minute average is already gone.

Facility candidates lose points on exam day in two boring ways: they bring the wrong edition or a non-AMA CPT, or they navigate approved books so slowly that the 10 cases at the end become guesses. Neither problem is a coding-knowledge problem. Both are preventable.

Two ways to sit the exam

AAPC offers:

1. Testing center — quiet room, equipment on site, in-person support if the computer fails, locations worldwide. AAPC frames this as the more traditional sitting.
2. At-home live remote proctor — flexible, including 24/7 scheduling. AAPC says your technology must meet published requirements, including an external webcam.

Choose the room in which you can work for four uninterrupted hours with three thick books open. At home, that means a clear desk, a stable connection, and no one crossing the camera. At a center, that means travel time, knowing how the site handles print books, and practicing with the same book stack you will carry in.

The exam is one sitting. AAPC's four-hour description does not add a scheduled lunch break. Plan food, restroom, and book layout before the clock starts. AAPC reminds candidates to breathe, keep the code books at hand, and treat the sitting as a demonstration of coding skill — then it immediately turns to timing, books, and prohibited devices, because those are the rules that can end the attempt.

Approved books: AAPC key 1, 2, and 4

AAPC's approved-code-books page uses a numbered key. For COC, the chart lists 100 questions and books 1, 2, 4.

AAPC's Taking the COC exam page matches the chart: AMA's CPT Professional Edition (current year); ICD-10-CM (current year), any publisher; HCPCS Level II (current year), any publisher. AAPC states these are the only code books allowed.

That chart is also how you avoid a common mix-up with CIC. CIC uses books 2 and 3 (ICD-10-CM and the International Classification of Diseases, Tenth Revision, Procedure Coding System (ICD-10-PCS)). Packing PCS "because hospitals use it" does not help a COC candidate and is not on the COC allowed list.

Current year, preceding year, and only one copy

AAPC highly recommends current-year books because code sets update annually. You may use preceding-year books, current-year books, or a combination — but only one copy of each book. Do not pack 2025 and 2026 CPT "just in case." If you mix years (for example current CPT with last year's HCPCS), know that a deleted, revised, or newly added code can make a lookup that was correct in your workplace encoder wrong against the exam's code set. Practice with the exact volumes you will use on test day.

Print versus eBook

AAPC allows printed books or eBooks. eBooks are provided through the exam platform so the environment is consistent. The platform includes a search function. Print books are the only place AAPC's handwritten-note and tab rules apply. Pick one workflow and run timed practice in that workflow. Switching to platform search for the first time while a 10-case operative note is on the screen is how strong coders still miss the 70-item bar.

Notes, tabs, and what AAPC forbids

AAPC's Taking the COC exam page is specific.

Allowed in print books

• Handwritten notes that pertain to daily coding activities
• Tabs inserted, taped, pasted, glued, or stapled if the obvious intent is to earmark a page with words or numbers, not to supplement information in the book

Not allowed

• Long passages of information on blank pages
• Questions from study guides, practice exams, or the exam itself
• Altering, whiting out, painting, or printing over pages (marketing pages, table of contents, reference pages) to add information
• Electronic devices with an on/off switch (phones, tablets, and similar) in the examination room — AAPC warns that failure to comply may disqualify the exam

Write the notes you actually use on a hospital outpatient desk: "modifier 73 versus 74," "Section IV: do not code uncertain as confirmed," "status indicator N is packaged." Do not paste a 12-page OPPS essay over the CPT index. Tabs that say "Integumentary" or "99281–99285" earmark pages. Tabs that are miniature textbooks do not.

Calculator

An online calculator is in the electronic testing platform. Physical calculators are not permitted. If a payment item needs arithmetic, use the on-screen tool. Do not bring a desk calculator "for APC math," and do not use a phone calculator in airplane mode — the phone is still a device with an on/off switch.

Timing the 100 items and the 10 cases

Four hours is 240 minutes. 240 ÷ 100 = 2.4 minutes, which is the figure AAPC prints. AAPC suggests reading answer choices before reading each question, saving harder items for last, and answering every question even if you are unsure — a blank is a miss, and more than 30 misses fails you.

AAPC places 10 cases at the end. Each case is one question that requires you to read documentation and assign CPT, ICD-10-CM, and HCPCS Level II. A common failure pattern is spending three to four minutes on early terminology stems, then rushing two-page operative notes.

A practical facility-coder pacing plan (this split is study advice, not an AAPC-mandated clock):

1. Minutes 0–10: Confirm books or eBook search, the on-screen calculator, the flag/review button, and where the cases begin. Do not start highlighting the CPT index after the clock is running.
2. First pass (~150 minutes): Answer lookup-light items (terminology, anatomy, many guideline and compliance stems). Flag long operative, drug, and claim-form items.
3. Second pass (~50 minutes): Return to flagged surgery, payment-methodology, and HCPCS items with the book already open to the right section.
4. Last ~40 minutes: The 10 cases. If a case is a wall, choose the codes the documentation actually supports, mark an answer, and move. You still need 70 correct overall.

Guessing is better than leaving a blank. AAPC says so explicitly.

Build muscle memory before exam week: index to tabular in ICD-10-CM, CPT guidelines before codes, parenthetical notes, and HCPCS Table of Drugs. An open book only helps a coder who already knows which page to open.

Candidate scenario: Jordan's almost-disqualifying bag

Jordan is a Certified Professional Coder (CPC) who now codes hospital outpatient surgery. The night before a remote COC sitting, Jordan packs AMA CPT Professional 2026, an older CPT Expert from another publisher "with better notes," ICD-10-CM, HCPCS Level II, a four-function calculator, and a tablet with an encoder "only for downtime."

Three of those items conflict with AAPC's published rules. The non-AMA CPT is not book 1. AAPC allows only one copy of each book anyway. The physical calculator is not permitted. The tablet is an electronic device with an on/off switch.

Jordan removes the extra CPT, the calculator, and the tablet. Remaining: one AMA CPT Professional, one ICD-10-CM, one HCPCS Level II, handwritten daily-coding notes, and tabs that mark code ranges — not essays. Jordan then runs a four-hour mock with those three books only, including 10 end-of-session cases, so print-versus-platform search is not a surprise when the live proctor is watching.

Recheck before exam week

• Taking the COC exam — notes, tabs, calculator, fees, remote versus center
• Approved code books for AAPC exams — COC = books 1, 2, 4
• AAPC's testing-center and at-home exam-day pages for current webcam and room rules