IVCH Medical Clinic David O'Donnell, DO Kelly DeBoer, MD Patricia Blackburn, PA-C Angela Massutti, FNP. 520 W. Walnut Street Oglesby, IL 61348. Phone: 815.883.3588. Hours Monday, Tuesday, Wednesday and Thursday 7 a.m. - 7 p.m. Friday 8 a.m. - 5p.m. St. Margaret's Health Oglesby Clinic Dexter Angeles MD 402 Walnut Street Oglesby, IL 61348.