; and (ii) in subsequent years, by the percentage increase in a market basket of certified community behavioral health clinic services, designed by the Secretary, or if such an index is not available, by the percentage increase in the MEI (as defined in section 1842(i)(3)) for the year involved. (3) Unit of payment In establishing a prospective payment amount under the system under this subsection, the Secretary shall consider an appropriate unit of service and a general system design that provides for continued access to quality services. (4) Periodic reevaluation of rates At the Secretary’s discretion, the Secretary shall, from time to time, adjust the amounts that would otherwise be applicable under subparagraph (2) by a percentage determined appropriate by the Secretary to reflect such factors as changes in the intensity of services furnished within a unit of service, the average cost of providing care per unit of service, and other factors that the Secretary considers to be relevant. Such adjustment shall be made before the update under clause (i) or (ii) of paragraph (2)(C)(i) has been applied for the year. . (d) Waiver of application of deductible Section 1833(b)(4) of the Social Security Act ( 42 U.S.C. 1395l(b)(4) ) is amended by inserting or certified community behavioral health clinic services before the comma at the end. (e) PRRB Review of cost reports Section 1878(j) of the Social Security Act ( 42 U.S.C. 1395oo(j) ) is amended by striking and a Federally qualified health center and inserting , a Federally qualified health center, and a certified community behavioral health clinic . (f) Safe harbor for waiver of coinsurance Section 1128B(b)(3)(D) of the Social Security Act (42 U.S.C. 1320a–7b(b)(3)(D)) is amended by inserting or a certified community behavioral health clinic after Federally qualified health care center . (g) Effective date The amendments made by this section shall apply with respect to services furnished on or after January 1, 2024. III Community behavioral health clinic grants 301.