CO-8 Denial Code Explained

CO-8 is a medical billing denial code that indicates the procedure code submitted is inconsistent with the provider type or provider specialty. This denial commonly occurs when the payer determines the provider is not eligible to bill for the reported service.

What Does CO-8 Mean?

The CO-8 denial code means the insurance payer identified a mismatch between the billed procedure and the provider’s specialty, credentials, or billing classification.

This denial is often related to provider enrollment issues or incorrect billing information.

Common Reasons for CO-8

• Incorrect provider specialty information

• Provider not credentialed for service

• Billing under incorrect provider type

• Invalid procedure and provider combinations

• Enrollment or contracting issues

• Incorrect taxonomy information

How To Fix CO-8

Verify provider enrollment details, taxonomy information, and payer credentialing requirements. Confirm the billed service is appropriate for the provider specialty before resubmitting the claim.

Providers may also need to update payer enrollment records.

Related Denial Codes

You may also encounter:

• CO-5 — Procedure inconsistent with place of service

• CO-11 — Diagnosis inconsistent with procedure

• CO-16 — Missing or incomplete claim information

• CO-45 — Charge exceeds payer fee schedule

Quick Summary

CO-8 indicates the billed procedure is inconsistent with the provider specialty or billing classification. Most denials are related to provider enrollment or coding issues.