; and (2) by inserting after subparagraph (A) the following new subparagraph: (B) Permanent expansion (i) If by July 1, 2019, the Secretary has not already expanded to all States the model of prior authorization described in paragraph (2) of section 515(a) of the Medicare Access and CHIP Reauthorization Act of 2015, by January 1, 2020, the Secretary shall expand the prior authorization model to all States using notice and comment rulemaking, regardless of whether or not the expansion meets the requirements described in paragraphs (1) through (3) of section 1115A(c). (ii) If the Secretary expands the model of prior authorization under this subparagraph— (I) the prior authorization shall be limited to ambulance services consisting of non-emergency basic life support services involving transport of an individual with end-stage renal disease for renal dialysis services (as described in section 1881(b)(14)(B)) furnished other than on an emergency basis; and (II) in making the prior authorization determination with respect to a service and individual, the Secretary shall evaluate the medical necessity of the service by determining— (aa) whether the individual is unable to get up from bed without assistance, unable to ambulate, and unable to sit in a chair or wheelchair; (bb) whether the individual has a medical condition that, regardless of bed confinement, is such that transport by ambulance is medically necessary