JW and JZ Modifier Billing Guidelines
Medicare Claims Processing Manual (Chapter 17, §40) mandates JW and JZ modifiers for separately payable Part B drugs/biologicals from single-use vials/packages to track administered vs. discarded amounts. Modifier Definitions Modifier Usage Requirement JW Discarded/not administered portion from single-use vial Separate line; full documentation of discard process JZ Entire single-use vial administered (no discard); effective 1/1/2023, … Read more