title: Medicare risk plans and the POS benefit.
authors.forename: D L
authors.initials: DL
authors.lastname: Olmstead
mesh_terms: D003256:Community Participation; D006279:Health Maintenance Organizations / Q000191:economics / Q000458:organization & administration* / Q000639:trends; D006801:Humans; D007342:Insurance Benefits / Q000191:economics / Q000639:trends; D006278:Medicare / Q000191:economics / Q000458:organization & administration* / Q000639:trends; D011787:Quality of Health Care; D012051:Reimbursement Mechanisms; D014481:United States