Sep 18, 2019 · Contact: Jamie Leszczynski. (Oswego, NY – September 17, 2019) Oswego Health is pleased to announce that the only gastroenterology practice in Oswego County is joining the health system. Ajoy Roy, MD and University Hill Gastroenterology Associates, located in Suite 400 of the Seneca Hill Health Services Center, officially became part of the ....