CO-39
Services denied at the time authorization/pre-certification was requested
What This Code Means
The payer had already denied authorization for this service before it was performed.
Common Causes
- Service was rendered despite an authorization denial
- Authorization denial wasn't communicated internally before scheduling
How to Resolve or Appeal
- Review the original authorization denial reason
- File an appeal if there's new clinical information supporting medical necessity
- Build a hard stop in scheduling for services with denied pre-authorizations
More Denial Codes to Check
Educational reference only — not medical or legal advice. Always confirm code usage and appeal rights with the specific payer.