Steven John O'Day, MD, is assistant director of medical oncology at the John Wayne Cancer Institute, an instructor at Harvard Medical School, and associate director of medical oncology at the Dana-Farber Cancer Institute. A specialist in the research of immunotoxins and hematopoietic growth factors, he has written many publications on biochemotherapy and radiosurgery, among other cancer-related topics.
O'Day has affiliations with the American College of Physicians, American Society of Clinical Oncology, American Society of Hematology, Medical Oncology Association of Southern California, Southern California Academy of Clinical Oncology, and the Southwest Oncology Group. Day received his bachelor's degree from Williams College in Massachusetts; after spending a year at Oxford University in England, he returned to the United States to earn his doctorate from the Johns Hopkins School of Medicine.