OSF teaming up with Carle’s Health Alliance on Medicare Advantage plan Oct 1, 2019 | Medicaid/Medicare, Top Stories OSF HealthCare is teaming up with Carle Foundation’s Health Alliance to launch a Medicare Advantage plan in 17 central and northern Illinois counties.To access this content, you must purchase 1 Year Health News Illinois Subscription or 1 Year Group Subscription - Up to 5 Users, or log in if you are a member.