Part D's underuse of generics wastes $1B per year.
D000368:Aged; D003920:Diabetes Mellitus / Q000188:drug therapy*; D017723:Drug Utilization Review; D016568:Drugs, Generic / Q000191:economics*; D006801:Humans; D007004:Hypoglycemic Agents / Q000191:economics*; D054524:Medicare Part D / Q000191:economics*; D014481:United States; D014493:United States Department of Veterans Affairs / Q000191:economics*
D016568:Drugs, Generic; D007004:Hypoglycemic Agents