Stephen Bader, MD

Portland: (503) 215-6029; Clackamas: (503) 513-3300
Areas of Focus: 
Prostate Cancer
Stereotactic Radiosurgery using the Gamma Knife
Benign and Malignant Tumors of the Brain
Breast Cancer
Gastrointestinal Cancer

About Me

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, MD

Dr. Bader graduated from the University of Washington and completed his internship and residency in internal medicine at the New England Deaconess Hospital, Harvard Medical School. He later finished his fellowship and became Chief Resident for the Joint Center for Radiation Therapy at Harvard Medical School. Dr. Bader is a member of several organizations, including the American Society for Clinical Oncology, the American Society for Therapeutic Radiation Oncology and the American Brachytherapy Society. Dr. Bader is also the former Medical Director of the Department of Radiation Oncology at Providence Health System and the Gamma Knife Center of Oregon. Dr. Bader focuses on breast cancer, lung cancer, head and neck malignancies and other radiation oncology needs at The Oregon Clinic - Radiation Oncology. To refer a patient or request an appointment, please call: (503) 215-6029 for The Oregon Clinic at Providence Cancer Center or (503) 513-3300 for The Oregon Clinic at Providence Clackamas Medical Center.

My Work

Hospitals Served: 
Providence Portland Medical Center
Providence St. Vincent Medical Center

Education & Honors

Board Certified: 
  • Internal Medicine
  • Radiation Oncology
Education & Training: 
  • Fellowship, Therapeutic Radiology, Joint Center for Radiation Therapy, Harvard Medical School, Boston, MA, 1991
  • Internship and Residency, Internal Medicine, New England Deaconess Hospital, Harvard Medical School, Boston, MA, 1985
  • MD, University of Washington School of Medicine, Seattle, WA, 1984
  • BS, University of Washington, Seattle, WA, 1980
  • Medical Director, Department of Radiation Oncology, Providence Health System, 1998-2006
  • Medical Director, Gamma Knife Center of Oregon, 2001-2003
  • Portland Monthly Magazine, "Top Doctors," 2016
  • Portland Monthly Magazine, "Top Doctors," 2009
Other Activities: 
  • Clinical Instructor, Oregon Health Sciences University, Portland, OR, 1991-Present
  • Member, American Society for Clinical Oncolgy
  • Member, American Society for Therapeutic Radiation Oncology
  • Member, American Brachytherapy Society
  • Member, Oregon Radiation Oncology Society
  • Member, American Board of Radiology
  • Member, American Medical Association
  • Member, Oregon Medical Association
  • Member, Multnomah County Medical Association