CO-252
An attachment/other documentation is required to adjudicate this claim/service
What This Code Means
The payer needs supporting documentation before it can process this claim at all.
Common Causes
- Claim type requires documentation by policy (e.g. certain DME, high-dollar procedures)
- Documentation wasn't included with the original submission
How to Resolve or Appeal
- Identify exactly what documentation the payer requires
- Submit it promptly through the payer's preferred channel and resubmit/reprocess the claim
More Denial Codes to Check
Educational reference only — not medical or legal advice. Always confirm code usage and appeal rights with the specific payer.