What CO-5 means
The service is not valid in the place of service reported on the claim.
The CO group code means this amount is a contractual obligation: under most contracts you cannot bill it to the patient.
Common causes
- Wrong place-of-service code, for example telehealth or office vs facility
How to fix it
- Correct the place of service and resubmit
- Check telehealth POS rules for the payer
Check the remark code (RARC) that came with the denial and the payer's own policy, since rules vary by payer and plan. This is a plain-English summary written by GetMax; the official code text is published by X12 at x12.org/codes.
Prevent it next time
Most denials are caused before the claim is sent. See 12 ways to reduce claim denials, or let our denial management team work them for you.