Dr. Roxanne Umanzor-smiley specializes in physician assistant in Fontana area. Dr. Roxanne Umanzor-smiley has a medical practice at 9961 Sierra Avenue, Fontana CA, and has over 24 years of experience in the field of medicine. She graduated from her medical school with her medical degree in 1993. Dr. Umanzor-smiley is accepting new patients at her medical office and practice location in Fontana, California. She is available for appointments, preventative care, medical care as well as ongoing patient care.