Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

Dr. Andrzej J Marzec, MD

Individual provider Gastroenterology Physician · NPI 1760559371

Dr. Andrzej J Marzec, MD is a Gastroenterology Physician in Janesville, Wisconsin. Licensed in Illinois and Wisconsin. Registered with an NPI since 2006.

Licensed in
IL, WI
In the registry since
2006
Specialties on file
2
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

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Practice location Address checks out

3524 E Milwaukee St
Janesville, WI 53546-1626
Phone: (608) 756-7100
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Gastroenterology Physician (primary) Taxonomy 207RG0100X · Licence 48642 (WI)
Gastroenterology Physician Taxonomy 207RG0100X (IL)

Record details

NPI number1760559371
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedNovember 29, 2006
Last updated in NPPESJuly 8, 2007

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