Dr. Ko graduated the medical school from the Tufts University School of Medicine and completed two residency programs: one at the Cedars-Sinai Medical Center and the other at the University of Massachusetts. A fellowship followed at the University of Alabama Medical Center soon after that. Dr. Ko is specialized in Pathology and board certified in Anatomic & Clinical Pathology and Cytopathology. She has been in practice for more than 20 years and is affiliated with the Arrowhead Regional Medical Center.