John Holzhauer, M.D.
Emergency Medicine Physician · Viroqua, WI
John Holzhauer, M.D. is an emergency medicine physician with a practice address in Viroqua, Wisconsin, and NPI 1548623747, issued on Apr 4, 2016. Check the license (Wisconsin 68634-20, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- John Holzhauer
- Credential
- M.D.
- Primary taxonomy
- Emergency Medicine Physician 207P00000X
- License number
- 68634-20 WI
Self-reported in NPPES; status is on the state search - Practice location
- 507 S Main St, Viroqua, WI 54665
- Phone
- (608) 637-2101
- Enumerated
- Apr 4, 2016
- Record last updated
- Dec 16, 2022
- Medicare enrollment
- Enrolled (PECOS I20200401000786); accepts Medicare assignment
- Entity
- Type 1 · individual
8 nearest emergency medicine physician records → All 1,464 in Wisconsin → Look up another NPI →
Also registered at 507 S Main St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Michael Ayers, CRNACertified Registered Nurse Anesthetist1386157204
- Kyle Bakken, M.D.Family Medicine Physician1285251835
- Cheryl Cade, COTAOccupational Therapy Assistant1306237615
- Alexa Colburn, NPFamily Nurse Practitioner1437886249
Verify John Holzhauer in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 68634-20Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
17% fewer Medicare Part D claims than the average emergency medicine physician in 2024
188 Medicare Part D claims for 141 beneficiaries, against an average of 226 among the 54,106 providers of this specialty who prescribed in Part D. 32 claims were for opioids.
Most prescribed
- Cephalexin16 claims
- Oxycodone Hcl15 claims
- Amoxicillin-Clavulanate Potass14 claims
- Hydrocodone-Acetaminophen11 claims
- Ondansetron Odt11 claims
- Prednisone11 claims
Source: CMS Medicare Part D Prescribers by Provider and Drug, 2024 (data.cms.gov). Part D covers prescriptions for Medicare patients only; drugs with fewer than 11 claims are not published.
Bills Medicare through one group practice
- The Medical College OF Wisconsin IncMilwaukee, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
John Holzhauer among 1,464 emergency medicine physician records in Wisconsin
John Holzhauer, M.D. is one of 1,464 emergency medicine physician records with a practice address in Wisconsin. 79% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2016, is newer than 74% of them.
- NPI issued2016 · 74% of these records are older, 22% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 58% of these records are
- Graduated2016 · median 2011 among the 844 with a school on file
- Record last updated2022 · 50% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207P00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
6 emergency medicine physician records list a practice address in Viroqua
They are 6 of the 241 NPPES records with a practice address in Viroqua, and 1,464 emergency medicine physician records in Wisconsin.
All 1,464 in Wisconsin → Every provider in Viroqua → Emergency Medicine Physician nationwide →
The 8 emergency medicine physician records with the nearest ZIP codes
- Yvonne Brault, MDViroqua, WI 546651588608244
- Anthony Macasaet, M.D.Viroqua, WI 546651316947559
- Andrew Manspeaker, M.D.Viroqua, WI 546651851730378
- Brendan Sotomayor, M.D.Viroqua, WI 546651306293311
- Adam Wuensch, MDViroqua, WI 546651750906350
- Sharel Martin, MDTomah, WI 546601114917648
- Ayman Nemr, M.D.Tomah, WI 546601780976787
- Emile Salvo, M.D.Tomah, WI 546601740227222
Common questions
What is John Holzhauer, M.D.'s NPI number?
John Holzhauer, M.D.'s National Provider Identifier (NPI) is 1548623747, issued on Apr 4, 2016. An NPI identifies a provider in billing; it is not a license.
Where is John Holzhauer, M.D. located?
The NPPES record lists a practice address at 507 S Main St, Viroqua, WI, 54665. Phone: (608) 637-2101. Providers update this record themselves, so call before visiting.
How can I verify John Holzhauer, M.D.'s license?
NPPES lists Wisconsin license number 68634-20, as entered by the provider. Search the Wisconsin Medical Examining Board at https://dsps.wi.gov/Pages/BoardsCouncils/MEB/Default.aspx. The NPPES record confirms identity only; the state search shows license status, expiration and public orders.
How much does John Holzhauer, M.D. prescribe under Medicare Part D?
In 2024, John Holzhauer, M.D. had 188 Medicare Part D claims for 141 beneficiaries; the average among emergency medicine physician prescribers was 226. Part D covers Medicare prescriptions only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.