Dr. Mary Feng specializes in treating patients with cancers in the abdomen (gastrointestinal and hepatobiliary). Her approach is to make sure care is compassionate and coordinated. Her research uses advanced biology and technical advances to personalize and adapt radiation treatments for each patient to make treatment the most effective with the least amount of side effects. Her primary goals are 1) Improving the lives of patients with cancer through new combination treatments; 2) Adapting radiation treatments based on early changes in blood and imaging tests; and 3) Testing the use of advanced technologies in radiotherapy.

Dr. Feng is Vice-Chair for Clinical Research in the Department of Radiation Oncology and the Medical Director of the Clinical Research Network Office in the Helen Diller Family Comprehensive Cancer Center, which brings clinical trials to patients closer to home at UCSF affiliates. She has also been the Clinical site director for the Mission Bay Clinic and Director of Quality Assurance and Safety for the Department of Radiation Oncology at UCSF. She also has served on numerous national and international cancer organization panels and groups, including the National Comprehensive Cancer Network Pancreatic Adenocarcinoma Panel, the American Society of Clinical Oncology Gastrointestinal Cancer Guideline Advisory Group, and the American Society for Radiation Oncology IHE-RO Clinical Advisory Subcommittee as co-chair.