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CO-31 - Denial Journal
CARC CO — Contractual Obligation

CO-31

Patient cannot be identified as our insured

What This Code Means

The payer’s records don’t show this patient as a covered member under the plan/ID submitted.

Common Causes

  • Wrong member ID or subscriber information submitted
  • Patient's coverage was never active with this payer

How to Resolve or Appeal

  1. Verify the member ID and subscriber details directly with the patient or their ID card
  2. Confirm eligibility for the date of service before resubmitting

More Denial Codes to Check

CARC CO-180 CARC CO-227 RARC MA60 CARC CO-100 CARC CO-178 CARC CO-52 CARC CO-27 Expenses incurred after coverage terminated RARC N30 Patient ineligible for this service CARC CO-26 Expenses incurred prior to coverage RARC MA90 CARC B9 Patient is enrolled in a Hospice CARC CO-33 Insured has no dependent coverage

Educational reference only — not medical or legal advice. Always confirm code usage and appeal rights with the specific payer.

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