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

John Holzhauer, MD

Individual provider Emergency Medicine Physician · NPI 1548623747

John Holzhauer, MD practises Emergency Medicine in Viroqua, Wisconsin. Qualified in 2016, 10 years ago. Practices with The Medical College of Wisconsin Inc, a 2,093-clinician group and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
10
Licensed in
WI
In the registry since
2016
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

507 S Main St
Viroqua, WI 54665-2059
Phone: (608) 637-2101
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Emergency Medicine Physician (primary) Taxonomy 207P00000X · Licence 68634-20 (WI)

Record details

NPI number1548623747
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedApril 4, 2016
Last updated in NPPESDecember 16, 2022
Certification dateDecember 16, 2022

Medicare enrollment

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

Medicare specialtyEMERGENCY MEDICINE
Medical schoolOTHER
Graduated 2016 (10 years in practice)
Group practice The Medical College Of Wisconsin Inc — 2093 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
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 patients111
Services billed 171 a service is one billed item, such as a visit, a test or a procedure
Average patient age78

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. Those with a page here are linked.

Colleagues at The Medical College of Wisconsin Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 2093 clinicians in the practice; 12 are shown here.

Other providers in Viroqua