Dr. Dennis Westin, MD is a board certified psychiatrist in Tucson, Arizona. ... Search all U.S. specialist profiles and refer a patient; Read the latest clinical news and earn CME/CEU credits; See Dr. Westin's full profile. Already have an account? Office. 5240 E Knight Dr Suite 120 Tucson, AZ 85712. Phone (520) 795-0309. Fax (520) 795-2030. Is ....