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Dr. O'Brien is on Doximity

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Education & Training

  • Geisinger Health System
    Geisinger Health SystemResidency, Orthopaedic Surgery, 1984 - 1989
  • Pennsylvania State University College of Medicine
    Pennsylvania State University College of MedicineClass of 1984

Certifications & Licensure

  • PA State Medical License
    PA State Medical License 1985 - 2024
  • MO State Medical License
    MO State Medical License 2017 - 2019
  • CA State Medical License
    CA State Medical License 2016 - 2018

Hospital Affiliations