CO-31Contractual Adjustment
Patient cannot be identified as insured
What this code means
The insurer cannot match the patient on this claim to an active member in their system. This is usually a data entry error.
What to do next
Verify the member ID, date of birth, and name on the claim match exactly what is on your insurance card. Ask your provider to correct and resubmit with accurate member information.
Appeal outlook: Very high when corrected
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