I would like some assistance in coding for medication waste because I believe there may have been some changes that I have missed.

I bill for a family practice office.

I have been billing the medication code with # of unitsof medication, the administration fee, and the medication code,JW with the # of units waste.

This has been paying until the middle of October and now the waste is being denied.

Any suggestions because I have looked and I am not able to find anything?

Edited to add: This is for an allergy injection where the medication is in a single use vial.

Thank you.

Melissa