1. Medicare Part B drug payments: impact of price substitutions based on 2015 average sales prices Publication: [Washington, D.C.] : U.S. Department of Health and Human Services, Office of Inspector General, September 2017 Subject(s): Drug CostsInsurance, Health, ReimbursementInsurance, Pharmaceutical ServicesMedicare -- economicsCost SavingsHumansUnited StatesUnited States. Department of Health and Human Services.Centers for Medicare & Medicaid Services (U.S.)