CO-181
Procedure code was invalid on the date of service
What This Code Means
The CPT/HCPCS code wasn’t a valid, active code as of the billed date of service.
Common Causes
- Code retired or replaced in the annual CPT/HCPCS update
- Code submitted before its effective date
How to Resolve or Appeal
- Confirm the code set valid for that specific date of service
- Correct and resubmit with the appropriate code
Educational reference only — not medical or legal advice. Always confirm code usage and appeal rights with the specific payer.