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

Dr. Martin L. Janssen, MD

Individual provider General Practice Physician · NPI 1417926023

Dr. Martin L. Janssen, MD is a General Practice Physician in Friendship, Wisconsin. Licensed in Wisconsin. Registered with an NPI since 2006.

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

See every abbreviation used in this directory →

Practice location Address checks out

402 W Lake St
Friendship, WI 53934-9699
Phone: (608) 339-3331
Fax: (608) 339-6975
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

General Practice Physician (primary) Taxonomy 208D00000X · Licence 13648 (WI)

Record details

NPI number1417926023
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMarch 16, 2006
Last updated in NPPESAugust 13, 2012

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