Mark William Wirtz
Family Medicine Physician · Verona, WI
Mark William Wirtz is a family medicine physician with a practice address in Verona, Wisconsin, and NPI 1063772275, issued on May 22, 2012. Check the license (Wisconsin 71092-20, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Mark William Wirtz
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License numbers
- 71092-20 WI
MD-41706 IA
Self-reported in NPPES; status is on the state search - Practice location
- 100 N Nine Mound RD, Verona, WI 53593
- Phone
- (608) 845-9531
- Enumerated
- May 22, 2012
- Record last updated
- Jan 19, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20190711000452); accepts Medicare assignment
- Medical or professional school
- Northwestern University Feinberg Medical School, 2012
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,765 in Wisconsin → Look up another NPI →
Also registered at 100 N Nine Mound RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Brian Arndt, MDFamily Medicine Physician1326085069
- Samantha Barbour, MDStudent in an Organized Health Care Education/Training Program1730749896
- Claire Boyce, MDStudent in an Organized Health Care Education/Training Program1528692365
- Marcelle BullaStudent in an Organized Health Care Education/Training Program1346037348
Verify Mark William Wirtz in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 71092-20Check 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 family medicine physician in 2024
2,942 Medicare Part D claims for 272 beneficiaries, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 128 claims were for opioids.
Most prescribed
- Atorvastatin Calcium218 claims
- Amlodipine Besylate168 claims
- Losartan Potassium112 claims
- Rosuvastatin Calcium110 claims
- Lisinopril100 claims
- Levothyroxine Sodium87 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
- University OF Wisconsin Medical Foundation IncVerona, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Mark William Wirtz among 3,765 family medicine physician records in Wisconsin
Mark William Wirtz is one of 3,765 family medicine physician records with a practice address in Wisconsin. 75% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2012, is newer than 69% of them.
- NPI issued2012 · 69% of these records are older, 29% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileYes · 62% of these records are
- Graduated2012 · median 2007 among the 2,347 with a school on file
- Record last updated2021 · 56% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207Q00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
23 family medicine physician records list a practice address in Verona
They are 23 of the 482 NPPES records with a practice address in Verona, and 3,765 family medicine physician records in Wisconsin.
All 3,765 in Wisconsin → Every provider in Verona → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Brian Arndt, MDVerona, WI 535931326085069
- John Beasley, MDVerona, WI 535931124089420
- Kathleen Carr, MDVerona, WI 535931649235755
- Susan Carson, MDVerona, WI 535931679533970
- Marilyn Chohaney, MDVerona, WI 535931003875642
- Joel Gordon, MDVerona, WI 535931306875711
- Sarah James, D.O.Verona, WI 535931356514160
- Magnolia Larson, DOVerona, WI 535931841459658
Common questions
What is Mark William Wirtz's NPI number?
Mark William Wirtz's National Provider Identifier (NPI) is 1063772275, issued on May 22, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Mark William Wirtz located?
The NPPES record lists a practice address at 100 N Nine Mound RD, Verona, WI, 53593. Phone: (608) 845-9531. Providers update this record themselves, so call before visiting.
How can I verify Mark William Wirtz's license?
NPPES lists Wisconsin license number 71092-20, 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 Mark William Wirtz prescribe under Medicare Part D?
In 2024, Mark William Wirtz had 2,942 Medicare Part D claims for 272 beneficiaries; the average among family medicine physician prescribers was 3,544. 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.