Michael Garrett Hermsen, MD
Internal Medicine Physician · Madison, WI
Michael Garrett Hermsen, MD is an internal medicine physician with a practice address in Madison, Wisconsin, and NPI 1518652593, issued on Apr 6, 2023. Check the license (Wisconsin 85006-20, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Michael Garrett Hermsen
- Credential
- MD
- Primary taxonomy
- Internal Medicine Physician 207R00000X
- License number
- 85006-20 WI
Self-reported in NPPES; status is on the state search - Practice location
- 7102 Mineral Point RD, Madison, WI 53717
- Phone
- (608) 828-7676
- Enumerated
- Apr 6, 2023
- Record last updated
- May 11, 2026
- Medicare enrollment
- Enrolled (PECOS I20260518002029); may accept Medicare assignment
- Medical or professional school
- University Of Chicago, Pritzker School Of Medicine, 2023
- Entity
- Type 1 · individual
8 nearest internal medicine physician records → All 2,078 in Wisconsin → Look up another NPI →
Also registered at 7102 Mineral Point RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
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Verify Michael Garrett Hermsen in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 85006-20Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
98% fewer Medicare Part D claims than the average internal medicine physician in 2024
61 Medicare Part D claims for 19 beneficiaries, against an average of 3,176 among the 108,855 providers of this specialty who prescribed in Part D. Brand-name drugs were 23% of claims.
Most prescribed
- Metoprolol Succinate11 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.
Michael Garrett Hermsen among 2,078 internal medicine physician records in Wisconsin
Michael Garrett Hermsen, MD is one of 2,078 internal medicine physician records with a practice address in Wisconsin. 70% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2023, is newer than 92% of them.
- NPI issued2023 · 92% of these records are older, 6% newer
- In a Medicare fileYes · 70% of these records are
- In the CMS Doctors and Clinicians fileYes · 53% of these records are
- Graduated2023 · median 2002 among the 1,098 with a school on file
- Record last updated2026 · 55% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207R00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
417 internal medicine physician records list a practice address in Madison
They are 417 of the 15,014 NPPES records with a practice address in Madison, and 2,078 internal medicine physician records in Wisconsin.
All 2,078 in Wisconsin → Every provider in Madison → Internal Medicine Physician nationwide →
The 8 internal medicine physician records with the nearest ZIP codes
- Lorna Belsky, MDMadison, WI 537171912974536
- John Blanchard, MDMadison, WI 537171982671517
- Shobhina Chheda, MDMadison, WI 537171538136213
- Daniela Constantinescu, MDMadison, WI 537171033103940
- David Feldstein, MDMadison, WI 537171396712444
- James Haine, MDMadison, WI 537171629063110
- Peter Idsvoog, MDMadison, WI 537171407822448
- Kristin Lewicki, MDMadison, WI 537171285695106
Common questions
What is Michael Garrett Hermsen, MD's NPI number?
Michael Garrett Hermsen, MD's National Provider Identifier (NPI) is 1518652593, issued on Apr 6, 2023. An NPI identifies a provider in billing; it is not a license.
Where is Michael Garrett Hermsen, MD located?
The NPPES record lists a practice address at 7102 Mineral Point RD, Madison, WI, 53717. Phone: (608) 828-7676. Providers update this record themselves, so call before visiting.
How can I verify Michael Garrett Hermsen, MD's license?
NPPES lists Wisconsin license number 85006-20, 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 Michael Garrett Hermsen, MD prescribe under Medicare Part D?
In 2024, Michael Garrett Hermsen, MD had 61 Medicare Part D claims for 19 beneficiaries; the average among internal medicine physician prescribers was 3,176. 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.