Barr Petersen, MD, Internal Medicine, Billings, MT, Billings Clinic


Internal Medicine Billings, MT

Hospital Medicine/Hospitalist


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  • Dr. Barr Petersen, MD is a board certified internist in Billings, Montana. He is currently licensed to practice medicine in Montana, California, and Arizona. He is affiliated with Billings Clinic.

Education & Training

  • University of Utah
    University of UtahResidency, Internal Medicine, 2006 - 2009
  • University of Colorado Denver School of Medicine
    University of Colorado Denver School of MedicineClass of 2006

Certifications & Licensure

  • MT State Medical License
    MT State Medical License 2016 - 2022
  • CA State Medical License
    CA State Medical License 2013 - 2016
  • AZ State Medical License
    AZ State Medical License 2009 - 2013
  • UT State Medical License
    UT State Medical License 2008 - 2016
  • American Board of Internal Medicine Internal Medicine

Hospital Affiliations