; and (B) by inserting before the semicolon at the end the following: , and (II) with respect to certified community behavioral health clinic services for which payment is made under section 1834(aa), the amounts paid shall be equal to 80 percent of the lesser of the actual charge or the amount determined under such section . (2) Development and implementation of prospective payment system Section 1834 of the Social Security Act ( 42 U.S.C. 1395m ) is amended by adding at the end the following new subsection: (aa) Development and implementation of prospective payment system for certified community behavioral health clinics (1) Development The Secretary shall develop a prospective payment system for payment to certified community behavioral health clinics (as defined in section 1861(aa)(8)) for the furnishing of certified community behavioral health clinic services (as defined in such section) under this title. Such system shall be established to take into account the type, intensity, and duration of services furnished by certified community behavioral health clinics. Such system may include adjustments, including geographic adjustments, as determined appropriate by the Secretary. (2) Implementation (A) In general The Secretary shall provide, for cost reporting periods beginning on or after January 1, 2024, for payments of prospective payment rates for certified community behavioral health clinic services furnished by certified community behavioral health clinics under this title in accordance with the prospective payment system developed by the Secretary under paragraph (1). (B) Initial payments The Secretary shall implement such prospective payment system to reflect the national average allowable service costs of such clinics on the basis of the most current audited cost report data for two fiscal years available to the Secretary