191 Denial Code (Deactivated) – Use P2

191 is a retired claim adjustment reason code. Payers stopped using it on 07/01/2014. Current remittances use P2 instead.

Seeing 191 on a Remittance?

191 was retired effective 07/01/2014 and should not appear on new remittances.
Payers now report this situation with P2 — check that page for current guidance.
Official retirement note: Use code P2
If 191 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.