Browse Health
Emergency Physician, Internist
33 years of experience
Accepting new patients
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 

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Additional Information
Dr. Lewis Albert Sierra MD is a male Emergency Medicine Specialist, has 33 years of experience and practices in Internal Medicine and Emergency Medicine.
Where does Dr. Lewis A. Sierra practice?
Dr. Lewis Sierra has 1 office location.
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.