Mary M. Horowitz, MD, MS

Professor and Deputy Cancer Center Director; Robert A. Uihlein, Jr. Chair in Hematologic Research; Associate Director of Genomics; Scientific Director Emeritus, CIBMTR


  • Froedtert Hospital
  • Cancer Center - Froedtert Hospital


  • Hematology
  • Hospitalist
  • Medical Oncology


  • English


  • MD - Doctor of Medicine
  • MS


Dr. Mary Horowitz currently holds the Robert A. Uihlein, Jr. Chair in Hematologic Research and is a tenured Professor of Medicine at the Medical College of Wisconsin (MCW), where she is also an active blood and marrow transplant physician. She is also Chief Scientific Director of the Center for International Blood and Marrow Transplant Research. She received MCW’s Distinguished Service Award in June 2006, MCW’s highest honor. In 2010, Dr. Horowitz received the American Society of Hematology Mentor Award. The award recognizes scientists who have dedicated their life to the process of guiding, supporting and promoting the training and career development of their junior colleagues. In 2014, Dr. Horowitz received the American Society of Blood and Marrow Transplant’s Lifetime Achievement Award in recognition of her contributions to the advancement of transplantation as a therapy for life-threatening diseases.

Research Interests

Dr. Horowitz is a member of the editorial boards of the journals Blood, Bone Marrow Transplantation, and Biology of Blood and Marrow Transplantation. She has served on the Board of Directors of the National Marrow Donor Program (NMDP) and as a member of the NMDP’s International Affairs Committee and, Research and Publications committees. Dr. Horowitz has served on the National Cancer Institute’s Cancer Clinical Investigation Review Committee, as well as on numerous advisory committees for public and private agencies, including the Data Safety and Monitoring Board of the National Heart Lung and Blood Institute’s Cord Blood Transplant Study, the Scientific Tumor Advisory Committee of the United Network for Organ Sharing, the Advisory Committee for the National Institute for Allergy and Infectious Disease Immune Tolerance Network and the 2005 Institute of Medicine Panel for Cord Blood Transplantation. She is the Principal Investigator of the Data and Coordinating Center of the U.S. Blood and Marrow Transplant Clinical Trials Network. She is also the Research and Project Director of the U.S. Stem Cell Therapeutic Outcomes Database, a component of the C.W. Bill Young Cell Transplantation Program, charged with collecting and assessing outcome data for all U.S. allogeneic transplants.

Dr. Horowitz has given more than 200 invited presentations on the subject of hematopoietic stem cell transplantation. Her research focuses on analysis of transplant outcomes with more than 250 papers in the biomedical literature.