> > > > Dr. Lewis Sierra, MD
Dr. Lewis Albert Sierra MD is a male Emergency Medicine Specialist, has 32 years of experience and practices in Internal Medicine and Emergency Medicine.
Dr. Lewis Sierra has 1 office location.
Agnesian Convenient Care
145 N Main St
Fond Du Lac, WI 54935

Phone Number
Locations and availability (1)
License & Identifications

A medical license is required for a doctor to practice medicine in a particular state. Requirements vary by state but most require, at a minimum, post-graduate training in the doctor’s specific specialty. An NPI number is a national identifier unique to an individual health care provider and is managed by the Center for Medicare & Medicaid Services (CMS).

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Specialties & Research

Dr. Lewis Sierra, MD is board certified in Internal Medicine.

Education & Awards

Dr. Sierra graduated from University of Wisconsin at Madison.


Dr. Sierra has 1 hospital affiliations:

  • St Agnes Hospital 

Accepted Insurance Plans

Dr. Sierra accepts these health insurances in at least one office:

  • Dean Health Plan - 2 plans
  • Great-West Healthcare - 1 plan
  • Cigna - 3 plans

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Additional Information
Where does Dr. Lewis A. Sierra practice?
Dr. Lewis Sierra practices Internal Medicine and Emergency Medicine near Fond Du Lac, WI.
See Fond Du Lac Internists and Fond Du Lac Emergency Physicians.