M43Remark Code (RARC)Deactivated
M43 Remark Code (Deactivated)
M43 is a retired remittance advice remark code. Payers stopped using it on 01/31/2004.
Seeing M43 on a Remittance?
- M43 was retired effective 01/31/2004 and should not appear on new remittances.
- Official retirement note: Consider using Reason Code 23
- If M43 appears on an old ERA you are reworking, interpret it per the remittance date, then follow the current code's guidance for any corrected claim.