Dr. Mary Feng has been in practice for over 20 years and specializes in treating patients with gastrointestinal and prostate cancers, integrating cutting edge technologies into clinical care. With the goal of standardizing and improving the quality of cancer care for patients, she has served on many national and international cancer initiatives and panels, including for the National Comprehensive Cancer Network, American Society of Clinical Oncology, American Society for Radiation Oncology, NRG Oncology and Integrating the Healthcare Enterprise-Radiation Oncology. She is currently the Vice Chair for Clinical Research in Radiation Oncology at the University of California San Francisco and leads the Clinical Research Network Office for the Comprehensive Cancer Center, expanding access to clinical trials for patients treated at regional hospitals and clinics.