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

Dr. Mark W Niedfeldt, MD

Individual provider Family Medicine Physician · NPI 1205887775

Dr. Mark W Niedfeldt, MD is a Family Practice in Mequon, Wisconsin. Graduated from Medical College of Wisconsin in 1988, 38 years ago. Practices with Colab Physicians, SC, a 2-clinician group and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
38
Trained at
Medical College of Wisconsin
Licensed in
WI
In the registry since
2006
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

10325 N Port Washington Rd Ste 150
Mequon, WI 53092-5768
Phone: (262) 643-4720
Fax: (262) 643-4721
Show map & directions

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

Specialties & licences

Family Medicine Physician (primary) Taxonomy 207Q00000X · Licence 35201 (WI)

Record details

NPI number1205887775
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedMay 12, 2006
Last updated in NPPESSeptember 24, 2024
Certification dateSeptember 24, 2024

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyFAMILY PRACTICE
Medical schoolMEDICAL COLLEGE OF WISCONSIN
Graduated 1988 (38 years in practice)
Group practice Colab Physicians, Sc — 2 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

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