Procedure not allowed for this provider type or specialty
The payer's file says this type of provider (taxonomy) does not bill this service.
CO = Contractual Obligation. The provider owes the difference. The patient cannot be billed for this amount. The same reason code can appear with a different group code; the group decides who may be billed.
Usual causes
- Rendering provider's taxonomy code missing or wrong on the claim.
- The provider is enrolled with the payer under a different specialty than the one that performs this service.
- A nurse practitioner or therapist billing a code the payer limits to physicians.
The fix
Check the taxonomy on the claim and in the payer's enrollment record. If the claim is wrong, correct it. If the enrollment is wrong, update it with the payer first, then ask for reprocessing.
Appeal or corrected claim?
Corrected claim for a wrong taxonomy. Appeal, with the provider's license and scope-of-practice reference, when the service is within scope and the payer policy is simply wrong.
Deadline to watch
Timely filing limit; appeal window per payer.
Exact limits are in your payer contract or provider manual. When in doubt, send the correction or appeal this week.
CO-8 in short
What does CO-8 mean?
The payer's file says this type of provider (taxonomy) does not bill this service. The official X12 text reads: "The procedure code is inconsistent with the provider type/specialty (taxonomy). Usage: Refer to the 835 Healthcare Policy Identification Segment (loop 2110 Service Payment Information REF), if present."
What usually causes a CO-8 denial?
Rendering provider's taxonomy code missing or wrong on the claim. The provider is enrolled with the payer under a different specialty than the one that performs this service. A nurse practitioner or therapist billing a code the payer limits to physicians.
How do I fix CO-8?
Check the taxonomy on the claim and in the payer's enrollment record. If the claim is wrong, correct it. If the enrollment is wrong, update it with the payer first, then ask for reprocessing.
Should I appeal CO-8 or send a corrected claim?
Correct or appeal (see note). Corrected claim for a wrong taxonomy. Appeal, with the provider's license and scope-of-practice reference, when the service is within scope and the payer policy is simply wrong.
What deadline applies to CO-8?
Timely filing limit; appeal window per payer.