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Denial Code 121

CARC 121: Indemnification adjustment - compensation for outstanding member responsibility

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

117
Transportation is only covered to the closest facility that can provide the necessary care
118
ESRD network support adjustment
119
Benefit maximum for this time period or occurrence has been reached
122
Psychiatric reduction
128
Newborn's services are covered in the mother's Allowance
129
Prior processing information appears incorrect. Remark code required

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