M127M-series (Medicare line-level)Documentation & Medical Necessity
M127: Missing patient medical record
The payer asked for the medical record for this service and doesn't have it — the claim can't be adjudicated without it.
Commonly appears with these denial codes
The denial code gives the category; M127 pinpoints the specific problem. Read them together before touching the claim.
What to do about it
Submit the requested records through the payer's documentation channel with the claim reference, and calendar the response deadline — these become CO-226 denials when they age out.
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