title: Aetna's unusual Medicare plan uses ACO-style approach.
authors.forename: Frank
authors.initials: F
authors.lastname: Diamond
mesh_terms: D003266:Continuity of Patient Care; D008329:Managed Care Programs / Q000592:standards*; D006278:Medicare / Q000458:organization & administration*; D019982:Organizational Case Studies; D011785:Quality Assurance, Health Care; D014481:United States