Karen Frances B. Mason, MD, FPCP, DPSE Gastroenterology Clinic Schedule: By Appointment See also different: Aprilyn T. Gagtan, MDCarina V. Chavente, MD, FPCPGlenn Ernest Fonbuena, MD, FPCP, FPSG, FPSDERonillo A. Instrella, MD, FPAMS, FPSDVirginia B. Mangati, MD, FPCP, DPSN<< return to doctors