Skip to main content
Lewis Sierra, MD, Internal Medicine, Fond du Lac, WI

Lewis A Sierra MD


Physician

Join to view full profile
  • 145 N Main StFond du Lac, WI 54935

  • Phone+1 920-926-8492

Join Doximity

As a Doximity member, you’ll join more than three million U.S. healthcare professionals—including 85+% of physicians, and 2/3 of all NPs and PAs—in a private, secure network.

  • Gain access to free telehealth tools, such as our "call shielding" and one-way patient texting.
  • Connect with colleagues in the same hospital or clinic.
    You already have 2 invites waiting!
  • Read the latest clinical news, personalized to your specialty.

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
  • Internal Medicine
    American Board of Internal Medicine Internal Medicine

Awards, Honors, & Recognition

  • CMS Meaningful Use Stage 1 Certification Cerner Patient Portal and Powerchart, Cerner Corporation, 2014
  • CMS Meaningful Use Stage 1 Certification Cerner Patient Portal and Powerchart, Cerner Corporation, 2014
  • CMS Meaningful Use Stage 1 Certification Cerner Patient Portal and Powerchart, Cerner Corporation, 2014