Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Brett A. Linzer, MD

Individual provider Internal Medicine Physician · NPI 1083686653

Brett A. Linzer, MD practises Pediatric Medicine in Oconomowoc, Wisconsin. Graduated from Loyola University of Chicago, Stritch School of Medicine in 1996, 30 years ago. Licensed in Wisconsin.

Years since qualifying
30
Trained at
Loyola University of Chicago, Stritch School of Medicine
Licensed in
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

1185 Corporate Center Dr Prohealth Care Medical Associates Inc
Oconomowoc, WI 53066-4887 Not confirmed with CMS for 14 years — call before visiting
Phone: (262) 928-8400
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Internal Medicine Physician (primary) Taxonomy 207R00000X · Licence 42014 (WI)
Pediatrics Physician Taxonomy 208000000X · Licence 42014 (WI)

Record details

NPI number1083686653
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedFebruary 7, 2006
Last updated in NPPESApril 13, 2012

Medicare enrollment

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

Medicare specialtyPEDIATRIC MEDICINE
Also practisesINTERNAL MEDICINE
Medical schoolLOYOLA UNIVERSITY OF CHICAGO, STRITCH SCHOOL OF MEDICINE
Graduated 1996 (30 years in practice)
Accepts Medicare assignment Not indicated
Practice locations2 on file with Medicare

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 patients224
Services billed 505 a service is one billed item, such as a visit, a test or a procedure
Average patient age74

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.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

Other providers in Oconomowoc