title: HCFA's influence as the nation's largest purchaser of health services.
authors.affiliation: Health Care Financing Administration, Washington, DC 20201, USA.
authors.forename: B C
authors.initials: BC
authors.lastname: Vladeck
mesh_terms: D014487:Centers for Medicare and Medicaid Services, U.S. / Q000458:organization & administration*; D003284:Contract Services / Q000458:organization & administration*; D006279:Health Maintenance Organizations / Q000458:organization & administration*; D006801:Humans; D006278:Medicare; D011314:Preventive Health Services / Q000458:organization & administration*; D019984:Quality Indicators, Health Care; D014481:United States