Jennifer S. Shimshak, PA-C
Medical Physician Assistant · Onalaska, WI
Jennifer S. Shimshak, PA-C is a medical physician assistant with a practice address in Onalaska, Wisconsin, and NPI 1598028128, issued on Jun 19, 2012. Check the license (Wisconsin 2922, as entered in NPPES) with the Wisconsin board that licenses this profession; the Medicare figures below come from public CMS files.
- Name
- Jennifer S. Shimshak
- Credential
- PA-C
- Primary taxonomy
- Medical Physician Assistant 363AM0700X
- License number
- 2922 WI
Self-reported in NPPES; status is on the state search - Practice location
- 3111 Gundersen Dr, Onalaska, WI 54650
- Phone
- (608) 775-8630
- Enumerated
- Jun 19, 2012
- Record last updated
- Jan 10, 2014 (not updated in 12 years: call before relying on the address or phone)
- Medicare enrollment
- Enrolled (PECOS I20120918000477); accepts Medicare assignment
- Telehealth
- Offers telehealth (CMS)
- Entity
- Type 1 · individual
8 nearest medical physician assistant records → All 687 in Wisconsin → Look up another NPI →
Also registered at 3111 Gundersen Dr
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Jeffrey Addison, D.O.Internal Medicine Physician1295268571
- Sarah Almonroeder, PA-CMedical Physician Assistant1598049322
- Joseph Angell, ATCAthletic Trainer1578556056
- Kellie Backman, APNPFamily Nurse Practitioner1639171895
- Janet Bahr, NPAdult Health Nurse Practitioner1619163276
- Kelley Bahr, MDFamily Medicine Physician1366441297
Verify Jennifer S. Shimshak in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich Wisconsin board licenses this profession
Search for license 2922Check the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
2.1 times the Medicare Part D claims of the average medical physician assistant in 2024
2,375 Medicare Part D claims for 401 beneficiaries, against an average of 1,148 among the 23,801 providers of this specialty who prescribed in Part D. Brand-name drugs were 13% of claims. 53 claims were for opioids.
Most prescribed
- Atorvastatin Calcium243 claims
- Lisinopril128 claims
- Levothyroxine Sodium119 claims
- Omeprazole85 claims
- Losartan Potassium78 claims
- Metoprolol Succinate74 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
- Gundersen Clinic LtdSparta, WI
Source: CMS Doctors and Clinicians National Downloadable File (the group practices a clinician bills Medicare through) (data.cms.gov).
Jennifer S. Shimshak among 687 medical physician assistant records in Wisconsin
Jennifer S. Shimshak, PA-C is one of 687 medical physician assistant 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 2012, is newer than 45% of them.
- NPI issued2012 · 45% of these records are older, 54% newer
- In a Medicare fileYes · 79% of these records are
- In the CMS Doctors and Clinicians fileYes · 70% of these records are
- Graduated2012 · median 2016 among the 479 with a school on file
- Record last updated2014 · 51% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 363AM0700X and a Wisconsin practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
9 medical physician assistant records list a practice address in Onalaska
They are 9 of the 568 NPPES records with a practice address in Onalaska, and 687 medical physician assistant records in Wisconsin.
All 687 in Wisconsin → Every provider in Onalaska → Medical Physician Assistant nationwide →
The 8 medical physician assistant records with the nearest ZIP codes
- Sarah Almonroeder, PA-COnalaska, WI 546501598049322
- Emily Campbell, PAOnalaska, WI 546501588259022
- Anna Carnahan, PAOnalaska, WI 546501417543810
- Molly Jacobson, PA-COnalaska, WI 546501669531448
- Katelyn Kozelka, PAOnalaska, WI 546501760904288
- Leo PedrettiOnalaska, WI 546501114234580
- Jessica Spindler, PAOnalaska, WI 546501790270601
- James Tomlin, PAOnalaska, WI 546501376548768
Common questions
What is Jennifer S. Shimshak, PA-C's NPI number?
Jennifer S. Shimshak, PA-C's National Provider Identifier (NPI) is 1598028128, issued on Jun 19, 2012. An NPI identifies a provider in billing; it is not a license.
Where is Jennifer S. Shimshak, PA-C located?
The NPPES record lists a practice address at 3111 Gundersen Dr, Onalaska, WI, 54650. Phone: (608) 775-8630. Providers update this record themselves, so call before visiting.
How can I verify Jennifer S. Shimshak, PA-C's license?
NPPES lists Wisconsin license number 2922, as entered by the provider. Search the Wisconsin board that licenses this profession; the NPPES record confirms identity only.
How much does Jennifer S. Shimshak, PA-C prescribe under Medicare Part D?
In 2024, Jennifer S. Shimshak, PA-C had 2,375 Medicare Part D claims for 401 beneficiaries; the average among medical physician assistant prescribers was 1,148. 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.