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Denial Code 31

CARC 31: Patient cannot be identified as our insured

This is a Claim Adjustment Reason Code (CARC). CARCs explain why a payer adjusted or denied a claim line and appear with a group code (CO, PR, OA, PI). Codes appear on the EOB / ERA after a claim is adjudicated.

Reference only — CARC/RARC are national code sets updated periodically. Verify against the current official list before acting on a denial or appeal.

Related CARC codes

26
Expenses incurred prior to coverage
27
Expenses incurred after coverage terminated
29
The time limit for filing has expired
32
Our records indicate the patient is not an eligible dependent
33
Insured has no dependent coverage
34
Insured has no coverage for newborns

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