Medicare's outpatient prescription drug benefit.
D000368:Aged; D002388:Catastrophic Illness / Q000191:economics*; D014487:Centers for Medicare and Medicaid Services, U.S.; D003625:Data Collection; D003669:Deductibles and Coinsurance; D006801:Humans; D007356:Insurance, Pharmaceutical Services / Q000331:legislation & jurisprudence*; D006278:Medicare / Q000331:legislation & jurisprudence*; D013223:Statistics as Topic; D014481:United States