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Denial Code M64

RARC M64: Missing/invalid other diagnosis

This is a Remittance Advice Remark Code (RARC, M-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

M60
Missing Certificate of Medical Necessity
M61
We cannot pay for this as the approval period for the FDA clinical trial has expired
M62
Missing/invalid treatment authorization code
M65
One interpreting physician charge can be submitted per claim when a purchased diagnostic t…
M66
Our records indicate that you billed diagnostic tests subject to price limitations and the…
M67
Missing/invalid other procedure code(s)

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