Dr. Ellenhorn is a respected member of the surgical oncology community. He has given lectures on cancer treatment at prestigious facilities and universities across the country for nearly two decades, and is an active member and fellow of several notable surgical societies. Dr. Ellenhorn served as President of the Los Angeles Surgical Society in 2008, is the holder of two patents, and has been ranked in the top 1% of United States surgeons by U.S. News and World Report since 2011.