; and (B) by adding at the end the following new subparagraph: (KK) a preventive opioid overdose reversal drug (as defined in subsection (nnn)) furnished on or after January 1, 2024; . (2) Preventive opioid overdose reversal drug defined Section 1861 of the Social Security Act ( 42 U.S.C. 1395x ) is amended by adding at the end the following new subsection: (nnn) Preventive opioid overdose reversal drug The term preventive opioid overdose reversal drug means an opioid overdose reversal drug that is furnished by a physician, nurse practitioner, physician assistant, or other attending clinical personnel (as determined by the Secretary by regulation) to an individual who is an inpatient of a hospital, critical access hospital, or rural emergency hospital, or is a patient of the emergency department of such a hospital or an ambulatory surgical center, but only if— (1) such physician, nurse practitioner, physician assistant, or attending clinical professional determines that such individual is at risk for an opioid overdose; and (2) such drug is furnished at the time such individual is discharged from the hospital or leaves the emergency department or ambulatory surgical center, as the case may be, together with instructions for the administration of such drug. . (3) Prohibition of cost sharing Section 1833 of the Social Security Act ( 42 U.S.C. 1395l ) is amended— (A) in subsection (a)(1)— (i) in subparagraph (S)(i), by striking subparagraph (EE), and inserting subparagraphs (EE) and (II), ; (ii) in subparagraph (GG), by striking and at the end; and (iii) by inserting , and (II) with respect to a preventive opioid overdose reversal drug (as defined in section 1861(nnn)) furnished on or after January 1, 2024, the amounts paid shall be 100 percent of the lesser of the actual charges for such drug or the amount determined under section 1842(o) before the semicolon at the end; and (B) in subsection (b)— (i) by striking , and (13) and inserting (13)