Dr. Benedict John Marciano specializes in general surgery in San Ramon area. Dr. Benedict John Marciano, MD has a medical practice at 53 Elmwood Drive, Suite 1, San Ramon CA, and has over 44 years of experience in the field of medicine. He graduated from Georgetown University Of Medicine with his medical degree in 1973. Dr. Marciano is accepting new patients at his medical office and practice location in San Ramon, California. He is available for appointments, preventative care, medical care as well as ongoing patient care.