With round 1 not yet completed, the U.S. Centers for Medicare & Medicaid Services (CMS) already is prepping for round 2 of the Medicare negotiations mandated by the 2022 Inflation Reduction Act. While the negotiation process will expand to Part B drugs in the future, round 2, like the first cycle, will be limited to single-source Part D drugs that account for some of the highest Medicare expenditures. However, the number of drugs selected for the next cycle could grow from the current 10 to up to 15