Denial code · Contractual Obligation (CO)
CO-181 denial code
The service code was not valid on the date the service was given.
What the code means
Official meaning: Procedure code was invalid on the date of service.
In plain words: The service code was not valid on the date the service was given.
The usual fix
Check the service code and the date of service, fix the code to one that was valid on that date, and send the claim again corrected.
This is general information, not advice on a specific claim.
Learn on the job
Learn on the job with real denied claims.
Working denied claims is the medical claims desk's daily work. Read a code, find what is missing, fix the claim, or write the appeal.