title: United HealthCare buys Humana.
mesh_terms: D017046:Cost Savings; D004465:Economic Competition; D019981:Health Care Sector / Q000639:trends; D006269:Health Facilities, Proprietary / Q000191:economics / Q000458:organization & administration*; D006273:Health Facility Merger; D006801:Humans; D008329:Managed Care Programs / Q000191:economics / Q000458:organization & administration*; D009096:Multi-Institutional Systems; D010067:Ownership; D014481:United States