Denial Code Cheat Sheet: CARC & RARC Codes in Plain English (2026)

WHAT YOU GET

A plain-English guide to the claim denial codes primary care billing teams see most, with the usual cause and the fix for each, plus an editable denial log.

FILES

- 01-Denial-Code-Cheat-Sheet.pdf: full-color guide, 11 pages, US Letter

- 01-Denial-Code-Cheat-Sheet-PrintFriendly.pdf: the same 11 pages in low-ink black and white

- editable/Denial-Code-Checklists.docx: Word template

- editable/Denial-Log.docx: Word template

- README.txt: quick start and license

PAGE COUNT

11 pages (guide, US Letter), plus 2 editable Word templates

FORMAT

US Letter (8.5 x 11 in). PDF (full color and print-friendly black and white) and editable Microsoft Word .docx (also opens in Google Docs and LibreOffice). Delivered as one .zip file.

Instant digital download: your download link appears right after checkout and is emailed to you. No physical item is shipped.

HOW TO EDIT THE WORD FILES

1. Download and unzip the file on a computer.

2. Open any .docx file in Microsoft Word, Google Docs (File > Open > Upload) or free LibreOffice.

3. Optional: click the small header line at the top of the page and type your practice name, or leave it as-is. The templates look finished either way.

4. Type into the tables or edit any wording for your office, then save and print at 100% (actual size).

WHAT'S INSIDE

- About 50 common CARC denial codes and 27 key RARC remark codes, each with a plain-English meaning, usual cause and fix

- Codes grouped by the team that owns the fix: front desk, coding, coverage, authorization, enrollment, timing

- CO / PR / OA / PI group codes explained

- A 5-step fix-it flow and the top 5 root causes with prevention steps

- When to send a corrected claim, a reopening or an appeal

- Codes checked against the official X12 code lists (August 2026 code-status review)

LICENSE

Print and copy these files for use inside your own practice (one practice). Please do not resell or redistribute them.

PLEASE NOTE

Educational use only. Not legal, billing, coding or medical advice. Rules change and vary by Medicare Administrative Contractor (MAC), state and payer, so confirm with the official sources listed in the file. All examples are fictional. Not affiliated with or endorsed by CMS, HHS, X12 or any payer. CPT(R) is a registered trademark of the American Medical Association; code descriptions are short paraphrases.

AI DISCLOSURE: I wrote this with the help of AI tools and checked it against the official sources listed in the file.

(c) 2026 Clinic Revenue Guidess