Contact Information

Photo of Ruth O'Regan
Ruth O'Regan, MD



MADISON, WI 53792-0001

(608) 265-1700


Dr. O’Regan serves as Division Head, Hematology/Oncology, and Associate Director of Faculty Development and Education, UW Carbone Cancer Center. She is an internationally recognized breast cancer physician and researcher. Dr. O’Regan was previously a professor of hematology and medical oncology at Emory University, where she held the Louisa and Rand Glenn Family Chair in Breast Cancer Research and was the medical director at Glenn Family Breast Center of Emory University, director of the Breast Cancer Translational Research Program at the Winship Cancer Institute and chief of hematology and medical oncology at the Georgia Cancer Center for Excellence at Grady Memorial Hospital. With a highly active research program focused on identifying mechanisms of resistance to breast-cancer therapies and development of new therapies, Dr. O’Regan has been principal investigator for numerous grants and clinical trials. Her current research is focused on the development of novel therapeutic approaches to treat resistant breast cancers, including triple negative breast cancer. Dr. O’Regan has received multiple awards and is ranked by Newsweek/Castle Connolly Medical as one of the top oncologists in the nation.