Jennifer Tseng,

Jennifer Tseng, M.D., F.A.C.S., is a surgical oncologist who specializes in breast cancer surgery and the medical director of breast surgery for City of Hope^® Orange County Lennar Foundation Cancer Center. A strong supporter of shared doctor-patient decision-making, Dr. Tseng believes the best care comes when patients are fully informed and involved in every step of their cancer journey. Known for her careful attention to detail, Dr. Tseng is deeply committed to helping her patients achieve the best possible outcomes through thoughtful surgical planning and compassionate care. 

An Orange County native, Dr. Tseng earned her medical degree from the University of California, Davis. She then completed a general surgery training at Oregon Health & Science University in Portland, followed by an advanced fellowship in clinical immunotherapy at the National Cancer Institute and another in complex surgical oncology at the University of Chicago. She also pursued fellowships specializing in medical education and clinical ethics at the MacLean Center at the University of Chicago. 

At City of Hope Orange County, Dr. Tseng serves as medical director of breast surgery, where she offers leading-edge options for breast and soft tissue cancers, including oncoplastic techniques, nipple-sparing mastectomies with immediate reconstruction and access to clinical trials. Her research has appeared in publications including the Journal of Clinical Oncology and Annals of Surgery, and she has contributed to more than 100 peer-reviewed scientific publications. 

Before joining City of Hope, Dr. Tseng was a faculty member at the University of Chicago, where she received her department’s Excellence in Teaching Award. She is also active in national professional associations such as the Society of Surgical Oncology, the American Society of Clinical Oncology and the American Society of Breast Surgeons. 

Outside of work, Dr. Tseng enjoys spending time with her family and discovering the local food and arts scene.