charity patient assistance program. (4) Patient assistance The term patient assistance means assistance provided to offset the cost of drugs for individuals. Such term includes free products, coupons, rebates, copay or discount cards, and other means of providing assistance to individuals related to drug costs, as determined by the Secretary of Health and Human Services. (c) Report Not later than 24 months after the date of the enactment of this Act, the Comptroller General of the United States shall submit to Congress a report describing the findings of the study required under subsection (a). 147. MedPAC report on shifting coverage of certain Medicare part B drugs to Medicare part D (a) Study The Medicare Payment Advisory Commission (in this section referred to as the Commission ) shall conduct a study on shifting coverage of certain drugs and biologicals for which payment is currently made under part B of title XVIII of the Social Security Act ( 42 U.S.C. 1395j et seq.) to part D of such title ( 42 U.S.C. 1395w–21 et seq.). Such study shall include an analysis of— (1) differences in program structures and payment methods for drugs and biologicals covered under such parts B and D, including effects of such a shift on program spending, beneficiary cost-sharing liability, and utilization management techniques for such drugs and biologicals