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Dr. OBrien is on Doximity

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Education & Training

  • National Capital Consortium
    National Capital ConsortiumFellowship, Gastroenterology, 1989 - 1991
  • Mercy Hospital (St Louis)
    Mercy Hospital (St Louis)Residency, Family Medicine, 1983 - 1986
  • University of Missouri-Columbia School of Medicine
    University of Missouri-Columbia School of MedicineClass of 1983

Certifications & Licensure

  • MO State Medical License
    MO State Medical License 1984 - 2024
  • IL State Medical License
    IL State Medical License 1986 - 2005
  • MD State Medical License
    MD State Medical License 1988 - 1991

Hospital Affiliations