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Dr. Duffens is on Doximity

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Education & Training

  • Denver Health Medical Center
    Denver Health Medical CenterResidency, Emergency Medicine, 1984 - 1986
  • Providence Health & Services
    Providence Health & ServicesResidency, Internal Medicine, 1980 - 1984
  • University of Kansas School of Medicine
    University of Kansas School of MedicineClass of 1980

Certifications & Licensure

  • AZ State Medical License
    AZ State Medical License 2004 - Present
  • OR State Medical License
    OR State Medical License 1981 - 2025
  • WA State Medical License
    WA State Medical License 2006 - 2024
  • CA State Medical License
    CA State Medical License 2004 - 2019
  • HI State Medical License
    HI State Medical License 2003 - 2012
  • NV State Medical License
    NV State Medical License 2006 - 2011
  • CO State Medical License
    CO State Medical License 1984 - 2011
  • American Board of Emergency Medicine Emergency Medicine
  • American Board of Internal Medicine Internal Medicine
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Publications & Presentations

PubMed

Hospital Affiliations