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Dr. Shaffer is on Doximity

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Education & Training

  • Ascension Illinois/Saint Francis
    Ascension Illinois/Saint FrancisInternship, Transitional Year, 1978 - 1979
  • Universidad Nacional Autonoma de Mexico
    Universidad Nacional Autonoma de MexicoClass of 1977

Certifications & Licensure

  • CA State Medical License
    CA State Medical License 1989 - 2025
  • FL State Medical License
    FL State Medical License 1990 - 2000
  • IL State Medical License
    IL State Medical License 1980 - 1993

Publications & Presentations

PubMed