42 C.F.R. § 414.1700
(a) General rule. For home intravenous immunoglobulin (IVIG) items or services furnished on or after January 1, 2024, Medicare payment is made on the basis of 80 percent of the lesser of the following:
(d) Annual payment adjustment. The per visit payment amount represents payment in full for all costs associated with the furnishing of home IVIG items and services and is subject to the following adjustment: