Glenn Ernest Fonbuena, MD, FPCP, FPSG, FPSDE Gastroenterology, Internal Medicine Clinic Schedule: By Appointment See also different: Genoveva Sibayan, MD, FPCP Thelma Doris D. Gurion, MD Rosella Dizon, MD Allan D. Corpuz, MD, FPCP, DPRA Crisanta Gabriela B. Palabay , MD, FPCP, FPCCP << return to doctors