; or (iii) a drug or biological approved by the Food and Drug Administration on or after the date of enactment of this subsection and with respect to which payment has been made under this part for less than 18 months. . 103. Providing for variation in payment for certain drugs covered under part B of the Medicare program (a) In general Section 1847A(b) of the Social Security Act (42 U.S.C. 1395w–3a(b)) is amended— (1) in paragraph (1)— (A) in subparagraph (A), by inserting after or 106 percent the following: (or, for a multiple source drug (other than autologous cellular immunotherapy) furnished on or after January 1, 2021, the applicable percent specified in paragraph (9)(A) for the drug and quarter involved) ; and (B) in subparagraph (B) of paragraph (1), by inserting after 106 percent the following: (or, for a single source drug or biological (other than autologous cellular immunotherapy) furnished on or after January 1, 2021, the applicable percent specified in paragraph (9)(A) for the drug or biological and quarter involved) ; and (2) by adding at the end the following new paragraph: (9) Application of variable percentages based on percentile ranking of per beneficiary allowed charges (A) Applicable percent to be applied (i) In general Subject to clauses (ii), with respect to a drug or biological furnished in a calendar quarter beginning on or after January 1, 2021, if the Secretary determines that the percentile rank of a drug or biological under subparagraph (B)(i)(III), with respect to per beneficiary allowed charges for all such drugs or biologicals, is— (I) at least equal to the 85th percentile, the applicable percent for the drug for such quarter under this subparagraph is 104 percent; (II) at least equal to the 70th percentile, but less than the 85th percentile, such applicable percent is 106 percent; (III) at least equal to the 50th percentile, but less than the 70th percentile, such applicable percent is 108 percent