Advocate Medical Group. Our more than 1,500 top doctors and advanced practice clinicians give you easy access to expert care at more than 350 locations across Chicagoland and central Illinois. Advocate Medical Group provides primary care, specialty services, imaging and other outpatient services. Find a doctor. Find a location.Pay My Bill‧Advocate Health Care‧Release of Information‧Find a Location‧Leadership Team‧About Amg.