Dr. John S Leung is a California state licensed medical doctor, specializing in Emergency Medicine. Graduated Magna Cum Laude from Boston University School of Medicine, completed residency training in Northwestern University, Dr. Leung currently is working at Smart Clinic, located in 2707 E Valley Blvd #116 West Covina CA 91792 Please call +1-626-435-0042 to contact. | |||