M84
RARC (Medicare)
M84: Medical code sets used must be the codes in effect at the time of service.
The official meaning of remittance advice remark code M84 is below. We have not written a plain-English translation for this code yet; the search box on the translator covers the codes practices see most often.
How to use this code
A remark code explains the reason code next to it. Fix the item it names (a field, a document, a provider identifier) and send a corrected claim, or respond to the payer's request for information. Appeal only when the claim was right as sent.