Karen Frances B. Mason, MD, FPCP, DPSE Gastroenterology Clinic Schedule: By Appointment See also different: Chester O. Directo, MD, DPCPJoeffrey L. Zales, MDJohanna D. Tipallo, MD, DPCPLeah P. Sanglay, MD, FPCP, FPCCRosella Dizon, MD<< return to doctors