Beryl McCormick, M.D., is the Clinical Director in the Department of Radiation Oncology at Memorial Sloan-Kettering Cancer Center. She is also an Attending Radiation Oncologist in the Department of Medicine, at the New York Presbyterian Hospital and Professor of Radiation Oncology in Medicine at the Weill Medical College of Cornell University.

Dr. McCormick received her medical training at the College of Medicine of New Jersey, and then trained in radiation oncology at Memorial Sloan-Kettering Cancer Center. She worked and taught at the Albert Einstein College of Medicine, before returning to the staff of Memorial Hospital in 1980. Her major clinical and research interests have been in the fields of breast cancer, and eye cancer.

She was an American Cancer Society Junior Faculty Fellow for her breast cancer work and has received numerous awards ranging from the "Good Housekeeping List of Best Breast Cancer Doctors in America" (1989) to the recipient of the Manhattan Breast Cancer Awareness Award in 2001. She served as the first woman chairperson of the New York Metropolitan Breast Cancer Group from 1993 to 1995 and has vice-chaired the Breast Program Committee for ASCO. She is presently the Vice-Chairman of the Breast Committee for the RTOG Cooperative Group, Fellow of the American College of Radiology, and Fellow of the American Society for Therapeutic Radiology and Oncology (FASTRO). She has served on many consensus panels and written extensively on both breast and eye cancers.

Dr. McCormick developed a novel treatment for elderly women, using single-dose intraoperative radiation therapy in a feasibility study at Memorial Hospital. She continues her work in prone treatment position for primary breast cancers, with emphasis on improving the long-term normal tissue and cosmetic outcomes for women with breast cancer. Dr. McCormick is on the NCCN Breast Cancer Panel.