Welcome to OSF Medical Group in the Peoria area! We have more than 85 doctors and advanced practice providers in over 20 convenient locations throughout Peoria and many surrounding communities including Chillicothe, Roanoke, Washington, Hopedale, and Morton. We've devoted ourselves to recruiting the best-trained, most caring doctors from close to home and around the country, and to building an expansive network of cutting-edge facilities.. Rheumatology