W7 Denial Code (Deactivated) – Use P18

W7 is a retired claim adjustment reason code. Payers stopped using it on 07/01/2014. Current remittances use P18 instead.

Seeing W7 on a Remittance?

W7 was retired effective 07/01/2014 and should not appear on new remittances.
Payers now report this situation with P18 — check that page for current guidance.
Official retirement note: Use code P18
If W7 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.