Dr. Chang earned his MD at New York Medical College ad completed Diagnostic Radiology and Pathology & Laboratory Medicine residencies, and Surgical Pathology and Hematopathology fellowships. Dr. Chang is a board-certified Pathologist, and holds unrestricted State Medical Licenses in CA, NY, PA, and CT. He has authored many publications in peer-reviewed journals. He is a member of American Society for Clinical Pathology and College of American Pathologists. Previously, Dr. Chang was Staff Pathologist for Eisenhower Medical Center and Saratoga Hospital, Designated Forensic pathologist at Northern Regional Medical Examiner Office, NJ, Anatomical & Clinical Pathologist, Coney Island Hospital, NY, and Assistant Professor at Netter School of Medicine, Quinnipiac University.