Our Physicians

Stephen Bader, M.D.

Areas of Focus:

  • Benign and Malignant tumors of the brain
  • Breast Cancer
  • Gastrointestinal Cancer
  • Head and Neck malignancies
  • Lung Cancer
  • Prostate Cancer
  • Stereotactic Radiosurgery using Gamma Knife Perfexion
  • Stereotactic Body Radiation Therapy


  • B.S., University of Washington, Seattle, WA, 1980
  • University of Washington School of Medicine, Seattle WA, 1984
  • Internship, Residency, Internal Medicine, New England Deaconess Hospital, Harvard Medical School, Boston, MA, 1984-1987
  • Fellowship, Chief Resident, Joint Center for Radiation Therapy, Harvard Medical School, Boston, MA, 1987-91

Other Activities:

  • Medical Director, Department of Radiation Oncology, Providence Health System, 1998-2006
  • Medical Director, Gamma Knife Center of Oregon, 2001-2003
  • Clinical Instructor, Oregon Health Sciences University, Portland, OR, 1991-Present


  • American Society for Clinical Oncolgy
  • American Society for Therapeutic Radiation Oncology
  • American Brachytherapy Society
  • Oregon Radiation Oncology Society
  • American Board of Radiology
  • American Medical Association
  • Oregon Medical Association
  • Multnomah County Medical Association
Stephen Bader, M.D.
My first responsibility as an oncologist is to teach a patient and their family about their diagnosis of cancer, the natural history of the disease, how it is treated, and the role of radiotherapy in their disease process. I explain how my treatment team will provide them not only first rate care, but also the compassion and support that all cancer patients deserve.

Stephen Bader, M.D.


Clackamas Radiation

Oncology Center

Radiation Oncology - Providence Cancer Center


Providence Milwaukie

Providence Portland

Medical Center

Providence St. Vincent

Medical Center

Providence Willamette

Falls Medical Center


Internal Medicine
Radiation Oncology

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