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

Gretchen Mary Zirbel, MD

Individual provider Dermatology Physician · NPI 1588658371

Gretchen Mary Zirbel, MD is a Dermatology Physician in Brookfield, Wisconsin. Licensed in Wisconsin. Registered with an NPI since 2005.

Licensed in
WI
In the registry since
2005
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

13800 W North Ave Ste 100
Brookfield, WI 53005-4974 Not confirmed with CMS for 18 years — call before visiting
Phone: (262) 754-4488
Fax: (262) 754-4940
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Dermatology Physician (primary) Taxonomy 207N00000X · Licence 32404020 (WI)

Record details

NPI number1588658371
Entity typeIndividual (Type 1)
GenderFemale
Credentials MD
Sole proprietorNo
NPI enumeratedSeptember 7, 2005
Last updated in NPPESApril 20, 2008

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients483
Services billed 2,251 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

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