Commonwealth Medical Group, one of the largest remaining independent physician groups in the Milwaukee area, is breaking up and its 31 physicians are joining Wheaton Franciscan Medical Group or Aurora Advanced Healthcare. Commonwealth Medical Group employs about 200 people and has clinics in seven Wisconsin municipalities. Its physicians all specialize in family-practice or internal medicine. Seventeen of the group's doctors are going to work for Wheaton Franciscan Medical Group and 14 of them are going to work for Aurora Advanced.