Medicare Claims Processing Manual (Pub. 100-04), Ch. 17 § 100.2.9
Submission of Claims With the Modifier JW, “Drug Amount
100.2.9 - Submission of Claims With the Modifier JW, “Drug Amount
Discarded/Not Administered to Any Patient”
(Rev. 1313; Issued: 07-23-07; Effective/Implementation Dates: 08-23-07)
The JW modifier must not be used on Medicare Part B Drug CAP claims; providers shall
not code for wastage for drugs furnished under the CAP. Claims for drugs provided
under CAP submitted with the JW modifier will be treated as unprocessable.