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Mary M. Horowitz, MD, MS

Mary M. Horowitz, MD, MS

Chief and Professor
Robert A. Uihlein, Jr., Professor of Hematologic Research; Scientific Director, Center for International Blood & Marrow Transplant Research; Chief of Hematology and Oncology

"My clinical and research activities focus on the care and outcome of persons receiving blood and marrow transplants and in evaluating the role of transplantation in malignant and non-malignant diseases. I am particularly interested in understanding, treating and preventing long term complications of Transplantation such as chronic GVHD (graft versus host disease)."




  • Hematology
  • Hospitalist
  • Oncology

Board Certification

  • Internal Medicine

Hospital Affiliations

  • Froedtert Hospital

Patient Ages Seen

  • Adolescent
  • Adult
  • Senior

Languages Spoken

  • English

Treatments & Services

  • Blood and Marrow Transplantation

Clinic Locations

Cancer Center - Froedtert Hospital

9200 West Wisconsin Avenue
Milwaukee WI,  53226
(866) 680-0505
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Education / Training

  • Doctor of Medicine - Medical College of Wisconsin - Milwaukee (1980)
  • MS in Biostatistics & Clinical Epidemiology - Medical College of Wisconsin - Milwaukee (1991)
  • Residency in Internal Medicine - Medical College of Wisconsin - Milwaukee (1980-1984)
  • Chief Resident in Internal Medicine - Medical College of Wisconsin - Milwaukee (1984-1985)
  • Fellowship in Hematology & Oncology - Medical College of Wisconsin Affiliated Hospitals - Milwaukee (1987-1989)