Denial Code CO-31: Description, Meaning and How to Fix It
The payer cannot match the patient to a member record.
Official description
Patient cannot be identified as our insured.
Common cause
Wrong member ID, name, or date of birth, or the patient is not covered by this payer.
How to fix it
Correct the member ID and demographics against the card, re-verify eligibility, and resubmit.
Related denial codes
- CO-27: The patient's coverage had ended before the date of service.
- CO-140: The member ID and patient name on the claim do not match the payer's records.
- CO-45: The amount billed is higher than the payer's contracted (allowed) rate. The difference is a contractual write-off, not a patient balance.
- CO-16: The claim is missing required information or has an error. It is almost always paired with a RARC that names the specific missing field.
- CO-97: This service is bundled into another service that was already paid, so it is not paid separately.
- CO-18: The payer received this exact claim/service already.