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B18Denial Code (CARC)Deactivated

Effective 01/01/1995 · Updated 09/21/2008 · Stopped 03/01/2009

B18 Denial Code (Deactivated)

B18 is a retired claim adjustment reason code. Payers stopped using it on 03/01/2009.

Seeing B18 on a Remittance?

B18 was retired effective 03/01/2009 and should not appear on new remittances.
If B18 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.