Denial codes / CO-B7
Denial code B7CO-B7: Provider not eligible on this date
Provider not certified/eligible to be paid for this service on this date.
What to doRead the EOB, then decide
Often recoverableYes, when worked
The letters in front matter. CO means the office can't bill the patient for the amount; PR means the patient may owe it. The same number can appear with either, so read both parts.
Why dental offices see it
- Credentialing gap: the provider was not yet active with the plan on the date of service.
- Enrollment lapsed or was not renewed.
What to do
- Check the provider's effective date with the insurer.
- Once credentialed, ask about retroactive effective dates and resend.
- Appeal with credentialing documents if the insurer's record is wrong.
Stop it next time
Track credentialing dates and re-credentialing deadlines for every provider and plan.
How many CO-B7 claims are in your report? The free check counts them, ranks them by dollars and deadline and drafts the letter. It runs in your browser; nothing is uploaded.
Plain-English paraphrase; the official code list is maintained by X12. Insurer rules vary; check the insurer's provider manual. Not legal advice.