Southwest Suburbs Service Area Chicago Ridge, Oak Lawn, Bridgeview, Hometown, Hickory Hills, Justice, Burbank, Willow Springs, Bedford Park, Summit, Argo, Evergreen Park, and Chicago zip codes 60652 and 60655. Headquartered in Charlotte, North Carolina, Advocate Health services nearly 6 million patients and is engaged in hundreds of clinical trials and research studies, with Wake Forest University School of Medicine serving as the academic core of the enterprise.