Dr. Tommy Tiong Hien Oei specializes in internal medicine in Fontana area. Dr. Tommy Tiong Hien Oei, MD has a medical practice at 9961 Sierra Avenue, Fontana CA, and has over 20 years of experience in the field of medicine. He graduated from New York University School Of Medicine with his medical degree in 1997. He is affiliated with numerous hospitals, including Kaiser Foundation Hospital Fontana (CA) and more. Dr. Oei is accepting new patients at his medical office and practice location in Fontana, California. He is available for appointments, preventative care, medical care as well as ongoing patient care.