Welcome to DenialPro
Look up denial codes, understand what they mean, and find the next step without guessing. Premium Academy and practice tools unlock for enrolled students.
Instant Denial Code Lookup
Type a denial code, remark code, keyword, or the way it appears at work.
Search a Code
Start with what you see — CO16, PI16, COB11, B11, N290, a CPT/HCPCS procedure code, or a plain-English denial phrase.
Understand the Denial
Read the plain-English meaning, why it happened, what to check first, and what not to do yet.
Find Payer Guidance
See portal, appeal, submission, contact, fax/mail guidance, and official payer resources.
Download Free Tools
Keep quick-reference sheets, checklists, and templates ready while you work accounts.
Why DenialPro is different
Anyone can show you a code. We show you how to work it.
Not just the official definition — what the code actually means on a real account.
Corrected claim, reconsideration, appeal, payer follow-up, patient balance, or keep researching.
Where to check, where to submit, what portal to use, and when fax/mail is still appropriate.
Official X12, CMS, payer manuals, provider portals, and current payer guidance are linked on the page.
See how DenialPro works
Search → understand → check the payer → choose the right action. The beginner guide walks through the workflow in plain language.
Start the tutorialNo portal access? You can still investigate.
DenialPro links to official payer resources and explains whether to use a portal, provider manual, fax/mail route, clearinghouse, or payer phone follow-up.
Explore payer guidanceFree B-Series CARC Excel Cheat Sheet
Active B codes, plain-English meanings, and quick next steps. Opens in Excel.
Educational, practical, source-linked.
Definitions are grounded in official code sources. Payer instructions link back to official payer resources so teammates can verify current requirements before taking action.
Here’s how to use the site
1. Search the denial code
Use the Instant Denial Code Lookup on the homepage. You can type the code the way you see it at work — CO-16, CO16, B11, CO B11, COB11, N290, M51, and more.
Start Here
New to DenialPro? It’s easier than it looks.
You do not need to know where everything is. Start with the denial code you have in front of you, then DenialPro points you to the right next step.
1. Search the code
Try CO16, CO-16, B11, CO B11, COB11, N290, M51, or a plain-English phrase.
2. Resolve a denial
If the code does not tell the whole story, use the guided resolution tools to investigate the claim.
3. Learn & practice
Use the Academy and Practice Center when you want to understand the why, not just fix one account.