Mary O'Brien

Dr. Mary O'Brien joined Columbia Health in 1993. Prior to Columbia, Mary worked as the associate director of the emergency room at St. Luke's Hospital. 


  • M.D., Harvard Medical School
  • M.P.H., Columbia University (in progress)

Certifications and Licensure:

  • Board Certified in Internal Medicine and Emergency Medicine

Professional Experience:

  • Columbia College of Physicians and Surgeons St. Luke's Hospital

Awards and Honors:

  • Teacher of the Year Award at St. Luke's-Roosevelt Hospital