; and (2) by adding at the end the following new subparagraph: (E) Enrollee option regarding spreading cost-sharing (i) In general The Secretary shall establish by regulation a process under which, with respect to plan year 2022 and subsequent plan years, a prescription drug plan or an MA–PD plan shall, in the case of a part D eligible individual enrolled with such plan for such plan year with respect to whom the plan projects that the dispensing of a covered part D drug to such individual will result in the individual incurring costs within a 30-day period that are equal to a significant percentage (as specified by the Secretary pursuant to such regulation) of the annual out-of-pocket threshold specified in paragraph (4)(B) for such plan year, provide such individual with the option to make the coinsurance payment required under subparagraph (A) for such costs in the form of equal monthly installments over the remainder of such plan year. (ii) Significant percentage limitations In specifying a significant percentage pursuant to the regulation established by the Secretary under clause (i), the Secretary shall not specify a percentage that is less than 30 percent or greater than 100 percent. . (b) Alternative prescription drug coverage Section 1860D–2(c) of the Social Security Act ( 42 U.S.C. 1395w–102(c) ) is amended by adding at the end the following new paragraph: (4) Same enrollee option regarding spreading cost-sharing For plan year 2022 and subsequent plan years, the coverage provides the enrollee option regarding spreading cost-sharing described in and required under subsection (b)(2)(E). . 115. Establishing a monthly cap on beneficiary incurred costs for insulin products and supplies under a prescription drug plan or MA–PD plan (a) In general Section 1860D–2 of the Social Security Act ( 42 U.S.C. 1395w–102 ), as amended by sections 111 and 114, is amended— (1) in subsection (b)(2)— (A) in subparagraph (A), by striking and (E) and inserting (E), and (F)