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M72 Remark Code (Deactivated): Full 8-Digit Date

M72 meant a date on the claim was not entered as a full 8-digit date in MM/DD/CCYY format. X12 deactivated it and suggested MA52, which has also been retired; payers now use remarks for the specific date, such as M52 or M59.

X12 deactivated RARCM72 on October 16, 2003. Payers should no longer use it on new remittances, but it can still appear on older ERAs, corrected claims, and appeals.

Code: M72 (RARC M72)
Status: Deactivated StoppedOctober 16, 2003 (in use since January 1, 1997).
Code set: Remittance Advice Remark Codes (RARC)
Group codes: CO (Contractual Obligation): Usually paired with CARC 16 under CO; the date formatting was the provider's to correct.
Official description: Did not enter full 8-digit date (MM/DD/CCYY).
X12 Remittance Advice Remark Codes, retrieved September 25, 2026
Last verified: September 24, 2026 against the official X12 list.

What M72 meant

Remark M72 dealt with formatting. Payers required dates in a full eight-digit form, month, day, and four-digit year, and a claim with a shortened date was rejected. This mattered most on paper claims and older electronic formats, where two-digit years were still common.

What replaced it

X12’s note suggested MA52, a general missing or invalid date remark. MA52 has since been deactivated too. Payers now name the date that is wrong, for example M52 for the “from” date of service or M59 for the “to” date.

If you still see M72

It is a historical remark. For a current date rejection, check which date the remark identifies, confirm it is valid and consistent with the other dates on the claim, and resubmit. If your system prints paper claims, make sure the form settings produce complete dates in each date field.

MA52Deactivated (Missing/incomplete/invalid date.): The suggested replacement for a missing or invalid date, later deactivated as well.
M52 (Missing/incomplete/invalid 'from' date(s) of service.): Missing, incomplete, or invalid 'from' date of service.
M59 (Missing/incomplete/invalid 'to' date(s) of service.): Missing, incomplete, or invalid 'to' date of service.

M72 FAQ

Why did the date format matter so much?

Claims with two-digit years were ambiguous, especially around the year 2000 transition. Requiring the full century removed that ambiguity.

Can this happen on electronic claims today?

The electronic claim standard defines date formats, so format errors are usually caught by clearinghouse edits before the payer. Invalid or illogical dates can still be rejected.

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