Oisin O'Neill, MD, FRCSI, FACS

(503) 935-8500
Areas of Focus: 
Brain and Spine Tumors
Cerebrovascular Neurosurgery
General Neurosurgery/Complex Spine
Peripheral Nerve Surgery
Intraoperative MRI technology

About Me

Dr. O’Neill is a board certified neurosurgeon in the United States as well as in the European Union. He completed his medical training at the Royal College of Surgeons in 1985 and his neurosurgery training started in Richmond and Beaumont hospitals in Dublin, Ireland. In 1988, Dr. O’Neill and his family immigrated to the United States where he received neurosurgery training at the University of Washington and at Oregon Health & Sciences University. In 1991 he was examined and admitted as a Fellow of the Royal College of Surgeons in Ireland. Dr. O’Neill’s particular interests are in the treatment of brain tumors, stereotactic radiosurgery, and in the surgical treatment of the vascular pathology of the brain. Dr. O'Neill has extensive peer reviewed publications and book chapters.

My Work

Hospitals Served: 
Legacy Emanuel Medical Center
Providence Portland Medical Center
Providence St. Vincent Medical Center
Specialties: 

Education & Honors

Board Certified: 
Neurosurgery
Education & Training: 
  • Chief of Department of Neurosurgery & Neurology, Providence St. Vincent Hospital, Portland, OR, 2017
  • Clinical Instructor, Neurosurgery, Oregon Health & Science University, 1995
  • Attending Neurosurgeon, Oregon Health & Science University, 1995
  • Fellowship, Neurovascular/Interventional, Oregon Health & Science University, Portland, OR, 1993
  • Residency, Neurosurgery, Oregon Health & Science University, Portland, OR, 1994
  • Residency, Surgery & Neurosurgery, University of Washington, Seattle, WA, 1988
  • Senior House Office, Neurosurgery, St. Laurence Hospital/Beaumount Hospital, Dublin, Ireland, 1988
  • MD, Royal College of Surgeons, Dublin, Ireland, 1985
Honors: 
  • David Gault Medal in Obstetrics and Gynecology, 1984
  • 2nd Place, Lyons/Fitzsimons Prize in Surgery, 1985
  • Fellow of the Royal College of Surgeons, Dublin Ireland, 1991
  • Portland Monthly Magazine, "Top Doctors," 2008
  • Portland Monthly Magazine, "Top Doctors," 2009
  • Portland Monthly Magazine, "Top Doctors," 2016
  • Consumers Research Council of America, Top Surgeons, 2003
  • Consumers Research Council of America, Top Surgeons, 2009
Other Activities: 
  • Register, General Medical Council of Ireland
  • Member, American Association of Neurosurgeons
  • Member, Association of Northwest Physicians
  • Member, Southwest Oncology Group
  • Diplomat, American Board of Neurological Surgeons, 2000
  • Fellow, American College of Surgeons
  • Fellow, American Association of Neurosurgeons