CO-B7 denial code: provider not certified or eligible on the date of service

Claim adjustment reason code B7 says: this provider was not certified or eligible to be paid for this procedure or service on this date of service.

The problem is the rendering provider's status with the payer, not the patient's coverage. With group code CO, the patient can't be billed.

• A new clinician saw patients before their enrollment or credentialing with the payer was effective.
• Enrollment lapsed, for example after a revalidation deadline was missed.
• The clinician is enrolled at a different location or under a different group from the claim.
• The clinician's type isn't eligible to bill this service with this payer.
• The wrong rendering provider is on the claim.

1. Check the clinician's enrollment with the payer, including its effective date and the locations it covers.
2. Check the rendering provider on the claim against the note.
3. If enrollment was effective, correct the claim or appeal with proof of enrollment.
4. If it wasn't, ask the payer whether retroactive enrollment applies. Medicare allows a limited retroactive period in some cases; commercial plans set their own rules.

• Track each clinician's enrollment by payer and location, with effective and revalidation dates.
• Don't schedule a payer's patients with a clinician until their enrollment with that payer is effective.
• Put the correct rendering provider on every claim.

CO-B7 is decided before the visit, by who sees the patient.

Claira Health's AI agents confirm coverage and the right payer before the visit, so this denial is stopped at the front desk instead of coming back weeks later. Your team sees only what needs a decision, and approves every step. On a 20-minute call, we’ll walk through it using one of your own denials.

Related: PR-242, not a network provider. Book a 20-minute call.