Timothy Toonen, MD

Medical Oncology & Hematology


Timothy Toonen, MD

Medical Oncology & Hematology


Medical School

University of Wisconsin School of Medicine & Public Health, Madison, WI


University of Wisconsin School of Medicine & Public Health, Madison, WI


University of Wisconsin Hospital & Clinics, Madison, WI


Oncology & Hematology, Vanderbilt University, Nashville, TN


Primary Location

Hudson Clinic
2651 Hillcrest Drive, Suite 105
Hudson, WI 54016
Phone: (715) 280-9151

Areas of Special Interest

  • Colon Cancer
  • Lung Cancer
  • Prostate Cancer
  • Coagulation Disorders
  • Hematology
  • Leukemia
  • Lymphoma
  • Myelodysplasia


Philosophy of Care

The most important thing I can offer my patients is to listen to them.  I encourage my patients to take an active role in decision-making regarding their treatment options.


Academic Honors & Professional Achievements

Leadership: Dr. Toonen is the Vice President of Medical Oncology at Minnesota Oncology


  • Toonen TR, Hande KR. Topoisomerase II Inhibitors. In: Giaccone G, Schilisky 12, Sondel P, eds. Cancer Chemotherapy and Biological Response Modifiers, Annual 19. 2001.
  • Smith GF, Toonen TR. Primary Care of the Patient with Cancer. American Family Physician. 2007;75:1207-14.
  • Smith GF, Toonen TR. The Role of the Primary Care Physician During the Active Treatment Phase. Primary Care: Clinics in Office Practice. 2009;36:685-702.

Board Certification

  • Internal Medicine
  • Medical Oncology
  • Hematology


  • American Society of Clinical Oncology (ASCO)
  • American Society of Hematology (ASH)


I enjoy staying active with my family.  We enjoy traveling to warm destinations.  I have completed several marathons including the Boston Marathon.