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Denial Code N664

RARC N664: Adjusted based on a legal settlement

This is a Remittance Advice Remark Code (RARC, N-series) — a remark that supplements a CARC on the remittance advice (ERA/EOB) to add detail. 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 RARC codes

N661
Documentation does not support that the services rendered were medically necessary
N662
Consideration of payment will be made upon receipt of a final bill
N663
Adjusted based on an agreed amount
N665
Services by an unlicensed provider are not reimbursable
N666
Only one evaluation and management code at this service level is covered during the course…
N667
Missing prescription

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