1. Short title This Act may be cited as the Recovering Excessive Funds for Unused and Needless Drugs Act of 2019 or the REFUND Act of 2019 . 2. Requiring manufacturers of certain single-dose vial drugs payable under part B of the Medicare program to provide rebates with respect to discarded amounts of such drugs (a) In general Section 1834 of the Social Security Act ( 42 U.S.C. 1395m ) is amended by adding at the end the following new subsection: (x) Rebate for certain discarded single-Dose vial drugs (1) In general The manufacturer (as defined in section 1847A(c)(6)(A)) of a rebatable single-dose vial drug furnished in a calendar quarter shall, not later than 30 days after the date of receipt of information described in paragraph (2)(A)(iii) with respect to such quarter, provide to the Secretary a rebate that is equal to the amount specified in paragraph (3) for such drug for such quarter. (2) Secretarial duties (A) In general For each calendar quarter, the Secretary shall, with respect to a rebatable single-dose vial drug of a manufacturer furnished during such quarter— (i) require, through use of a modifier such as the JW modifier used as of the date of enactment of this subsection (or any such successor code that includes such data as determined appropriate by the Secretary), an indication on a claim for such drug of the amount of such drug that was discarded after such drug was furnished, if any; (ii) determine the rebatable amount (as defined in subparagraph (B)) with respect to such drug; and (iii) not later than 60 days after the end of such quarter, provide to such manufacturer notice of— (I) the total number of units of such drug discarded during such quarter (as determined by the Secretary based on the aggregate re­ba­ta­ble amount (as so defined) with respect to such drug for such quarter), if any