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Dr. O'Brien is on Doximity

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Education & Training

  • Johns Hopkins University School of Medicine
    Johns Hopkins University School of MedicineFellowship, Vascular and Interventional Radiology, 1999 - 2000
  • Geisinger Health System
    Geisinger Health SystemResidency, Radiology-Diagnostic, 1995 - 1999
  • Griffin Hospital
    Griffin HospitalInternship, Internal Medicine, 1994 - 1995
  • University College Cork Faculty of Medicine
    University College Cork Faculty of MedicineClass of 1990

Certifications & Licensure

  • ME State Medical License
    ME State Medical License 2000 - 2023
  • MD State Medical License
    MD State Medical License 1999 - 2001
  • PA State Medical License
    PA State Medical License 1996 - 2000
  • American Board of Radiology Diagnostic Radiology

Professional Memberships

Hospital Affiliations