Jennifer S. Karnowski, M.D.
Obstetrics & Gynecology Physician · Madison, WI
Jennifer S. Karnowski, M.D. is an obstetrics & gynecology physician with a practice address in Madison, Wisconsin, and NPI 1528386554, issued on May 14, 2010. Check the license (Wisconsin 56548, as entered in NPPES) on the Wisconsin Medical Examining Board; the Medicare figures below come from public CMS files.
- Name
- Jennifer S. Karnowski
- Credential
- M.D.
- Primary taxonomy
- Obstetrics & Gynecology Physician 207V00000X
- License number
- 56548 WI
Self-reported in NPPES; status is on the state search - Practice location
- 20 S Park St, Madison, WI 53715
- Phone
- (608) 775-6340
- Enumerated
- May 14, 2010
- Record last updated
- Jan 4, 2021 (not updated in 5 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20140919000025); accepts Medicare assignment
- Medical or professional school
- University Of Wisconsin School Of Medicine, 2010
- Entity
- Type 1 · individual
8 nearest obstetrics & gynecology physician records → All 796 in Wisconsin → Look up another NPI →
Also registered at 20 S Park St
A shared address usually means a shared clinic or building; it does not show who employs whom.
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- Elizabeth Bartholomew, LCSWClinical Social Worker1679851398
- Sarah Benedict, NPNurse Practitioner1336648039
- Eliza Bennett, M.D.Obstetrics & Gynecology Physician1003852161
- Stephen Bernsten, MDPlastic Surgery Physician1114989043
Verify Jennifer S. Karnowski in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWisconsin Medical Examining Board
Search for license 56548Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
69% fewer Medicare Part D claims than the average obstetrics & gynecology physician in 2024
51 Medicare Part D claims for 22 beneficiaries, against an average of 165 among the 28,733 providers of this specialty who prescribed in Part D.
Most prescribed
- Estradiol21 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 IncMadison, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jennifer S. Karnowski among 796 obstetrics & gynecology physician records in Wisconsin
Jennifer S. Karnowski, M.D. is one of 796 obstetrics & gynecology physician records with a practice address in Wisconsin. 71% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2010, is newer than 67% of them.
- NPI issued2010 · 67% of these records are older, 30% newer
- In a Medicare fileYes · 71% of these records are
- In the CMS Doctors and Clinicians fileYes · 60% of these records are
- Graduated2010 · median 2007 among the 478 with a school on file
- Record last updated2021 · 48% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 207V00000X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
Obstetrics & Gynecology Physician providers in Wisconsin
There are 796 obstetrics & gynecology physician records in Wisconsin.
All 796 in Wisconsin → Every provider in Madison → Obstetrics & Gynecology Physician nationwide →
The 8 obstetrics & gynecology physician records with the nearest ZIP codes
- Eliza Bennett, M.D.Madison, WI 537151003852161
- Milinda Carson, M.D.Madison, WI 537151275572034
- Rebecca Downs, M.D.Madison, WI 537151467686766
- Bruce Drummond, MDMadison, WI 537151659328201
- Rachel Gilbert, M.D.Madison, WI 537151639389034
- Kathy Hartke, MD SCMadison, WI 537151932129921
- Thomas Littlefield, M.D.Madison, WI 537151447415385
- Paul McLeod, MDMadison, WI 537151285600361
Common questions
What is Jennifer S. Karnowski, M.D.'s NPI number?
Jennifer S. Karnowski, M.D.'s National Provider Identifier (NPI) is 1528386554, issued on May 14, 2010. An NPI identifies a provider in billing; it is not a license.
Where is Jennifer S. Karnowski, M.D. located?
The NPPES record lists a practice address at 20 S Park St, Madison, WI, 53715. Phone: (608) 775-6340. Providers update this record themselves, so call before visiting.
How can I verify Jennifer S. Karnowski, M.D.'s license?
NPPES lists Wisconsin license number 56548, 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 Jennifer S. Karnowski, M.D. prescribe under Medicare Part D?
In 2024, Jennifer S. Karnowski, M.D. had 51 Medicare Part D claims for 22 beneficiaries; the average among obstetrics & gynecology physician prescribers was 165. 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.