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Dr. Keystone is on Doximity

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Education & Training

  • University of Michigan Health System
    University of Michigan Health SystemResidency, Internal Medicine, 1966 - 1969
  • University of Michigan Health System
    University of Michigan Health SystemResidency, Internal Medicine, 1963 - 1964
  • Zuckerberg San Francisco General Hospital and Trauma Center
    Zuckerberg San Francisco General Hospital and Trauma CenterInternship, Transitional Year, 1962 - 1963
  • University of Michigan Medical School
    University of Michigan Medical SchoolClass of 1962

Certifications & Licensure

  • OH State Medical License
    OH State Medical License Current
  • FL State Medical License
    FL State Medical License 2022 - Present
  • CA State Medical License
    CA State Medical License 1968 - 2025
  • MI State Medical License
    MI State Medical License 2021 - 2024
  • VA State Medical License
    VA State Medical License 2023 - 2024
  • VT State Medical License
    VT State Medical License 2022 - 2024
  • NV State Medical License
    NV State Medical License 2001 - 2017
  • American Board of Allergy and Immunology Allergy & Immunology
  • American Board of Internal Medicine Internal Medicine

Press Mentions

  • All About Travel Parasites and Their Problems
    All About Travel Parasites and Their ProblemsApril 2nd, 2018
  • ‘Crazy’ Mosquito Swarms Inside Rio’s Olympic Venues Spur Canadian MD to Urge Zika Protection
    ‘Crazy’ Mosquito Swarms Inside Rio’s Olympic Venues Spur Canadian MD to Urge Zika ProtectionJuly 6th, 2016