; and (iii) in areas other than those described in clauses (i) and (ii), the payment amount is equal to the sum of 75 percent of the adjusted payment amount established under clause (i) and 25 percent of the unadjusted fee schedule amount otherwise determined without taking into account this subparagraph. (F) Special rule for liquid oxygen (i) Payment (I) In general In lieu of the volume adjustment established under paragraph (5)(C), not later than January 1, 2025, the Secretary in consultation with suppliers, manufacturers, patients and patient advocates, and physicians, and through notice-and-comment rulemaking, shall establish a separate payment amount that meets the requirements of this subparagraph made to a supplier for the provision of liquid oxygen and liquid oxygen related equipment, supplies, and services that meets the requirements described in subparagraph (G). (II) Payment floor The payment amount established under subclause (I) may not be less than an amount equal to 200 percent of the 2015 Durable Medical Equipment, Prosthetics/Orthotics & Supplies Fee Schedule updated by the consumer price index for all urban consumers (United States city average) for years 2016 through 2024. (III) Update mechanism Beginning on January 1, 2026, the payment amount described in subclause (I) shall be increased annually by the projected percentage increase in the consumer price index for all urban consumers (United States city average) for the 12-month period ending December 31 of the previous year. (ii) Considerations In implementing the payment amount under this subparagraph, the Secretary shall take into account the cost of liquid oxygen on a per pound basis, the cost of liquid oxygen equipment, the infrastructure costs associated with providing liquid oxygen equipment and supplies (including labor, storage, transportation, maintenance, and similar costs), the cost of complying with Federal and State regulations specific to the delivery and transportation of liquid oxygen, and any other cost factors the Secretary