; (B) uses such prescription digital therapeutic as an integral part of a treatment for a related service; and (C) agrees to accept, as payment in full, after the application of any deductible or coinsurance that may be applied under this part, the amount established pursuant to paragraph (3). (3) Establishment of payment amount (A) In general The Secretary shall establish a payment methodology for a prescription digital therapeutic only in accordance with the requirements of this paragraph. (B) Development of fee schedule Within 180 days of the approval or clearance described in section 1861(kkk)(1)(A), the Secretary shall develop a proposed fee schedule for each prescription digital therapeutic so approved or cleared. In developing such fee schedule, the Secretary may use the gap filling process described on 84 Federal Register 60729 through 60742 and published on November 8, 2019. (C) Notice and comment required Upon the development of the proposed fee schedule described in subparagraph (B), the Secretary shall publish in the Federal Register such proposed fee schedule. Section 1871 shall apply to any proposed fee scheduled published pursuant to this subparagraph. (4) Rule of construction For purposes of paragraph (1), a service is related to the use of a prescription digital therapeutic if the service— (A) is an integral part of the use of the prescription digital therapeutic; (B) is necessary to achieve the full intended result of the prescription digital therapeutic; and (C) must, pursuant to the approval or clearance described in section 1861(kkk)(1)(A), be adjunctive to the use of the prescription digital therapeutic. . (d) Rule of construction