Dr. Marr graduated from Oregon Health & Science University (OHSU) and later completed a general surgery residency, urology, and renal transplant residency at OHSU. He finished a research fellowship at Northwestern University in Chicago, IL. Dr. Marr focuses on bladder cancer, kidney cancer, and general urology at The Oregon Clinic - Urology. He is also a volunteer for the International Volunteers of Urology, the Wallace Medical Concern, the Safehaven Community Outreach program and is an organizer for Physicians for Social Responsibility at OHSU.
Dr. Marr's personal interests include traveling, basketball, distance running, flying, hiking, and golfing.