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Denial Code A1

CARC A1: Claim/Service denied. Remark code required

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

307
Medicare Maximum Fair Price Standard Default Refund Amount Adjustment. Remark code require…
308
Payment is adjusted due to contracted funding agreement between the payer and provider
A0
Patient refund amount
A5
Medicare Claim PPS Capital Cost Outlier Amount
A6
Prior hospitalization or 30 day transfer requirement not met
A8
Ungroupable DRG

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