Karl Mathias Hoffmann, M.D.
Family Medicine Physician · Reedsburg, WI
Karl Mathias Hoffmann, M.D. is a family medicine physician with a practice address in Reedsburg, Wisconsin, and NPI 1689661084, issued on Sep 30, 2005. Check the license (Wisconsin 24534, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Karl Mathias Hoffmann
- Credential
- M.D.
- Primary taxonomy
- Family Medicine Physician 207Q00000X
- License number
- 24534 WI
Self-reported in NPPES; status is on the state search - Practice location
- 1900 N Dewey Ave, Reedsburg, WI 53959
- Phone
- (608) 524-6477
- Enumerated
- Sep 30, 2005
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Medicaid ID
- 30801100 WI
- Entity
- Type 1 · individual
8 nearest family medicine physician records → All 3,765 in Wisconsin → Look up another NPI →
Also registered at 1900 N Dewey Ave
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Debra Adams, CNMNurse Practitioner1245225945
- Diana Anderson, RPHPharmacist1245831445
- Deanna Benish, M.D.Family Medicine Physician1386631000
- Steven Benish, PH.D.Psychologist1164685582
- Diane Bindl, CNMAdvanced Practice Midwife1407841547
- Allison Brey, PA-CPhysician Assistant1528342672
Verify Karl Mathias Hoffmann in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 24534Check 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 family medicine physician in 2024
73 Medicare Part D claims, against an average of 3,544 among the 117,163 providers of this specialty who prescribed in Part D.
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.
Karl Mathias Hoffmann among 3,765 family medicine physician records in Wisconsin
Karl Mathias Hoffmann, M.D. 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 2005, is newer than 0% of them.
- NPI issued2005 · 0% of these records are older, 90% newer
- In a Medicare fileYes · 75% of these records are
- In the CMS Doctors and Clinicians fileNo · 62% of these records are
- Record last updated2007 · 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).
15 family medicine physician records list a practice address in Reedsburg
They are 15 of the 243 NPPES records with a practice address in Reedsburg, and 3,765 family medicine physician records in Wisconsin.
All 3,765 in Wisconsin → Every provider in Reedsburg → Family Medicine Physician nationwide →
The 8 family medicine physician records with the nearest ZIP codes
- Sydney Anderson, DOReedsburg, WI 539591386223204
- Deanna Benish, M.D.Reedsburg, WI 539591386631000
- Spencer Fast, MDReedsburg, WI 539591306990429
- Anne Harris, MDReedsburg, WI 539591619176500
- Robert Koontz, M.D.Reedsburg, WI 539591093700312
- Joanna Laukant, M.D.Reedsburg, WI 539591073508396
- Robert Mortimore, M.D.Reedsburg, WI 539591760479471
- Benjamin Nesseim, MDReedsburg, WI 539591093928004
Common questions
What is Karl Mathias Hoffmann, M.D.'s NPI number?
Karl Mathias Hoffmann, M.D.'s National Provider Identifier (NPI) is 1689661084, issued on Sep 30, 2005. An NPI identifies a provider in billing; it is not a license.
Where is Karl Mathias Hoffmann, M.D. located?
The NPPES record lists a practice address at 1900 N Dewey Ave, Reedsburg, WI, 53959. Phone: (608) 524-6477. Providers update this record themselves, so call before visiting.
How can I verify Karl Mathias Hoffmann, M.D.'s license?
NPPES lists Wisconsin license number 24534, 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 Karl Mathias Hoffmann, M.D. prescribe under Medicare Part D?
In 2024, Karl Mathias Hoffmann, M.D. had 73 Medicare Part D claims; 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.