123 Denial Code (Deactivated)

123 is a retired claim adjustment reason code. Payers stopped using it on 06/30/2007.

Seeing 123 on a Remittance?

123 was retired effective 06/30/2007 and should not appear on new remittances.
Official retirement note: Refer to implementation guide for proper handling of reversals.
If 123 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.