; and (C) the role of any fees charged by such pharmacy benefit managers. (4) Whether pharmacy benefit managers structure their formularies in favor of high-rebate prescription drugs over lower-cost, lower-rebate alternatives. (5) The average prior authorization approval time for pharmacy benefit managers. (6) Factors affecting the use of step therapy by pharmacy benefit managers. (c) Report Not later than 3 years after the date of enactment of this Act, the Comptroller General shall submit to the Secretary of Health and Human Services, the Committee on Health, Education, Labor, and Pensions of the Senate, and the Committee on Energy and Commerce of the House of Representatives a report containing the results of the study conducted under subsection (a), including policy recommendations. E Medicare and Medicaid Prescription Drug Reforms 371. Medicare part B rebate by manufacturers for drugs or biologicals with prices increasing faster than inflation (a) In general Section 1847A of the Social Security Act ( 42 U.S.C. 1395w–3a ) is amended by adding at the end the following new subsection: (h) Rebate by manufacturers for drugs or biologicals with prices increasing faster than inflation (1) Requirements (A) Secretarial provision of information Not later than 6 months after the end of each rebate period (as defined in paragraph (2)(A)) beginning on or after January 1, 2021, the Secretary shall, for each rebatable drug (as defined in paragraph (2)(B)), report to each manufacturer of such rebatable drug the following for such rebate period: (i) Information on the total number of units of the billing and payment code described in subparagraph (A)(i) of paragraph (3) with respect to such rebatable drug and rebate period. (ii) Information on the amount (if any) of the excess average sales price increase described in subparagraph (A)(ii) of such paragraph for such rebatable drug and rebate period. (iii) The rebate amount specified under such paragraph for such rebatable drug and rebate period. (B) Manufacturer rebate (i) In