WellStar Health System Profile and History . WellStar, a not-for-profit health system is comprised of hospitals, a physicians group, urgent care centers, homecare, hospice, a nursing center and the WellStar Foundation. Wellstar is headquartered in Marietta, Georgia. Get details for WellStar Atlanta Medical Center’s 4 employees, email format for wellstar.org and phone numbers. Founded in 1901, WellStar Atlanta Medical Center is a 762-bed acute care hospital, with campuses in downtown Atlanta and East Point, GA. It is the second largest licensed-bed hospital in Georgia. A teaching hospital, Atlanta Medical Center is a Level 1 Trauma Center.