; and (II) high unit cost increases over the past five years, especially where such increases are greater than the increases for covered part D drugs in general. (iii) A list of the covered part D drugs with no therapeutic substitute and data on spending under part D of the Medicare program on such drugs. (iv) Access to covered part D drugs. (v) Appeals by enrollees with respect to covered part D drugs not included on plan formularies. (B) Public availability of report The Secretary of Health and Human Services shall publish on the Internet website of the Centers for Medicare & Medicaid Services a copy of each report submitted under subparagraph (A). (2) MedPAC (A) Study The Comptroller General of the United States shall conduct a study on the negotiations conducted by the Secretary under section 1860D–11(i) of the Social Security Act ( 42 U.S.C. 1395w–111(i) ), as amended by subsection (a), including a description of how such negotiations are achieving lower prices for covered part D drugs (as defined in section 1860D–2(e) of the Social Security Act ( 42 U.S.C. 1395w–102(e) )) for Medicare beneficiaries. (B) Report Not later than January 1, 2022, the Comptroller General of the United States shall submit to Congress a report on the study conducted under subparagraph (A), together with recommendations for improving such negotiations. (c) CMI testing of negotiating drug and biological prices To improve value Section 1115A(b)(2) of the Social Security Act ( 42 U.S.C. 1315a(b)(2) ) is amended— (1) in subparagraph (A), by adding at the end the following new sentence: The models selected under this subparagraph shall include at least 3 of the models described in subparagraph (D), which shall be implemented by not later than 18 months after the date of the enactment of the Prescription Drug and Health Improvement Act of 2017