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Summary

  • Dr. Lewis Sierra, MD is a board certified internist in Fond du Lac, Wisconsin. He is currently licensed to practice medicine in Wisconsin.

Education & Training

  • University of South Dakota
    University of South DakotaResidency, Internal Medicine, 1978 - 1981
  • University of Wisconsin School of Medicine & Public Health
    University of Wisconsin School of Medicine & Public HealthClass of 1978

Certifications & Licensure

  • WI State Medical License
    WI State Medical License 1985 - 2025
  • American Board of Internal Medicine Internal Medicine

Professional Memberships