CO-B7: Provider not certified/eligible to be paid for this service
UPDATED JULY 2026 · U.S. PLANS · NOT LEGAL OR MEDICAL ADVICE
A credentialing problem on the provider's side for this service or date. Not about your coverage.
CO-B7 at a glance
- Code group: CO — Contractual Obligation — in-network providers generally cannot bill you for CO adjustments.
- Who usually fixes it: The provider’s billing office.
- Worth appealing? Rarely — usually fixed by resubmission.
What to do about a CO-B7 denial
- The provider's office resolves credentialing with the payer and resubmits.
- In-network, you generally can't be billed for a provider credentialing failure — push back if billed.
Denied? Don’t drop it
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