Brian S. Levitt, MD, FACG, AGAF. For quality gastroenterology services from a friendly and caring team, call San Jose Gastroenterology. Close Skip to Content High Contrast Increase Text Size Clear All Patient Portal. 408-347-9001. Home; About Us. Office Policies; FAQ; Our Doctors. Brian S. Levitt, MD, FACG, AGAF; Geeta Kutty, MD; Huy Anh Nguyen ....