His involvement in societies dedicated to research and education about vein disease means that he utilizes state-of-the-art techniques in vein care. Dr. Monahan is a member of the American Venous Forum and the American College of Phlebology. Dr.Monahan was born in Honolulu, Hawaii. On his mother’s side, he is a seventh-generation descendant of the first missionary physician to Hawaii. On his father’s side he is a seventh-generation northern Californian. He graduated from the University of California at Davis in 1976. Returning to his home in Hawaii, he attended medical school at the University of Hawaii. Post-graduate training took him to the Cleveland Clinic, and then to Virginia Mason Clinic in Seattle, Washington, where he completed his general surgery residency in 1987.
Dr. Monahan first went into private practice in general surgery in Los Altos, California. Later, he moved to join a practice in Auburn, California. Greater exposure to expertise in the treatment of vein disease during his training prepared him to include this service for both health and cosmetic concerns within his general surgery practice. With new technological developments in diagnosis and treatment of vein disease, treating varicose veins became increasingly sophisticated. A few physicians came to believe that treating vein disorders warranted time and intensity of focus as a separate specialty. In 2001 Dr. Monahan opened the Vein Surgery and Treatment Center, now Monahan Vein Clinic, in Roseville, California to provide that service, and shortly thereafter discontinued his practice of general surgery to devote all of his time to treating vein disease.