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Denial Code N203

RARC N203: Missing/invalid anesthesia time/units

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

N199
Additional payment/recoupment approved based on payer-initiated review/audit
N200
The professional component must be billed separately
N202
Additional information/explanation will be sent separately
N204
Services under review for possible pre-existing condition. Send medical records for prior …
N205
Information provided was illegible
N206
The supporting documentation does not match the information sent on the claim

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