; and (ii) by inserting before the semicolon at the end the following: and (II) with respect to crisis response services described in section 1861(s)(2)(KK), the amounts paid shall be 80 percent of the lesser of the actual charge for the service or the amount determined under the payment basis established under section 1834(aa) . (B) Establishment of payment basis Section 1834 of the Social Security Act ( 42 U.S.C. 1395m ) is amended by adding at the end the following new subsection: (aa) Payment for crisis response services The Secretary shall establish a payment basis determined appropriate by the Secretary with respect to crisis response services (as defined in section 1861(nnn)) furnished by a provider of services or supplier. . (4) Ambulance transport of individuals in crisis (A) In general Section 1834(l) of the Social Security Act ( 42 U.S.C. 1395m(l) ) is amended by adding at the end the following new paragraph: (18) Transportation of individuals in crisis With respect to ambulance services furnished on or after the date that is 3 years after the date of the enactment of the Behavioral Health Crisis Services Expansion Act, the regulations described in section 1861(s)(7) shall provide coverage under such section for ambulance and other qualified emergency transport services to transport an individual experiencing a mental health or substance crisis to an appropriate facility, such as a community mental health center (as defined in section 1861(ff)(3)(B)) or other facility or provider identified by the Secretary, as appropriate, for crisis response services described in section 1861(s)(2)(KK). . (B) Conforming amendment Section 1861(s)(7) of such Act ( 42 U.S.C. 1395x(s)(7) ) is amended by striking section 1834(l)(14) and inserting paragraphs (14) and (18) of section 1834(l) . (5) Effective date The amendments made by this subsection shall apply to services furnished on or after the date that is 3 years after the date of the enactment of this Act. (b) Mandatory coverage of crisis response services under the