How does RARC N421 pair with CARCs?

RARC N421 is a remark code that appears alongside CARCs on the 835 electronic remittance advice to provide detail about the adjustment.

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RARC Code Reference

RARC N421: Claim payment was the result of a payer's retroactive adjustment due to a review organization decision.

By Mindy Corbett, CSPO, CPC, CPB, CPPM · Last updated: August 2026

Claim payment was the result of a payer's retroactive adjustment due to a review organization decision.

Code type RARC (Remark)

Category Reference

See the full resolution workflow for RARC N421

Members of the EDI-Code Intelligence Lab get the step-by-step rework path, appeal language, root-cause drivers, and prevention checklist for every RARC and CARC pairing, plus payer-specific quirks.

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