Dennis C. Westin, MD is a psychiatrist who practices at Marshall W Jones Md, PLLC located at 5240 E Knight Dr in Suite 120 in Tucson, AZ 85712 (Pima County). Dr. Dennis C. Westin has 15+ years of experience in psychiatry. Education. Dennis C. Westin, MD earned a degree of a Doctor of Medicine. Licenses and Affiliations. Dennis C. Westin, MD has ....