He was responsible for establishing Cardinal Free Clinics (CFC) as the administrative body that operates two free clinics in the area: the Arbor Free Clinic and the Pacific Free Clinic. CFC receives support, and is integrated with courses, within the School of Medicine. In his capacity as director of CFC, Osterberg has supervised scores of students and other providers who, as volunteers, provide free medical care on weekends to medically needy members of the community.