; (ii) units included under the single payment system for renal dialysis services under section 1881(b)(14); or (iii) units of a part B rebatable drug of a manufacturer that is furnished to an individual, if such manufacturer, with respect to the furnishing of such units of such drug, provides for discounts under section 340B of the Public Health Service Act or for rebates under section 1927. (C) Determination of inflation-adjusted payment amount The inflation-adjusted payment amount determined under this subparagraph for a part B rebatable drug for a calendar quarter is— (i) the payment amount for the billing and payment code for such drug in the payment amount benchmark quarter (as defined in subparagraph (D))