Biography & Education

Oisin O’Neill, M.D., is a board-certified neurosurgeon with a focus on neuro-oncology and brain-tumor management. He earned his medical degree at the Royal College of Surgeons in Dublin, Ireland. Dr. O’Neill was a resident neurosurgeon in Dublin, then at the University of Washington and Oregon Health & Science University. He has been involved in clinical research, authored many chapters in neurosurgery textbooks and is published extensively in peer-review journals.
Areas of expertise

Cranial surgery, spinal surgery, neuro-oncology, brain tumors

M.D., Royal College of Surgeons, Dublin, Ireland.
  • English
  • French

Care Locations

The Oregon Clinic-Neurosurgery East
5050 NE Hoyt St.
Suite 359
Portland, OR 97213
Fax 503-935-8505
The Oregon Clinic-Neurosurgery West
9155 SW Barnes Road
Suite 440
Portland , OR 97225
Fax 503-935-8505


Board Certifications
  • Neurological surgery