Medicare members like plans, providers, but could be happier.
D000368:Aged; D019985:Benchmarking; D014487:Centers for Medicare and Medicaid Services, U.S.; D003284:Contract Services / Q000592:standards; D019538:Health Care Surveys; D006279:Health Maintenance Organizations / Q000592:standards* / Q000706:statistics & numerical data; D006801:Humans; D016345:Medicare Part B / Q000458:organization & administration / Q000592:standards*; D017060:Patient Satisfaction / Q000706:statistics & numerical data*; D010817:Physician-Patient Relations; D014481:United States