CO-B7: This provider was not certified/eligible to be paid for this procedure/service on this date of service.
The billing or rendering provider was not certified, enrolled, or credentialed with the payer to be paid for this specific procedure as of the date it was performed.
What the group code means
- CO
- Contractual Obligation. The provider is responsible and the amount cannot be billed to the patient.
Why it fires
- The provider's enrollment or credentialing with the payer had not been finalized, or was retroactively effective after this date of service
- The provider is credentialed for the payer generally but not for this specific specialty or procedure category
- A required certification lapsed or had not yet been obtained on this date
Corrective actions, ranked
- 1
Check enrollment effective dates
Verify the provider's payer enrollment or credentialing effective date against the date of service.
- 2
Request retroactive enrollment if eligible
Many payers allow retroactive effective dates when the application was submitted before the service. Ask the credentialing department to pursue this.
- 3
Rebill under a covered provider
If another provider on the claim, such as a supervising physician, was eligible, correct the rendering provider and resubmit.
Is it worth appealing
Appeal when the provider was actually enrolled effective on or before the date of service and the payer's system simply has not updated, or when retroactive enrollment applies.
Related remark codes
Retrieved 2026-07-18.
Do not let this happen again
Scrub the claim against NCCI PTP and MUE edits before you submit, free and in your browser.
DenialPath provides billing and administrative guidance based on published CMS and X12 sources. It is not medical advice, not a coverage determination, and not a guarantee of payment. NCCI and MUE edits are republished quarterly and payer policies vary by contract. Always confirm against the payer's own current policy before submitting or appealing.