Jennifer Shimshak, PA-C
NPI 1598028128 · Medical Physician Assistant · Onalaska, WI
Enrolled with Medicare as Practitioner - Physician Assistant · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Jennifer Shimshak, PA-C is a Medical Physician Assistant provider in Onalaska, WI (NPI 1598028128).
Provider details
- NPI number
- 1598028128
- Entity type
- Individual
- Primary specialty
- Medical Physician AssistantPhysician Assistants & Advanced Practice Nursing Providers
- Credential
- PA-C
- Sex
- Female
- Sole proprietor
- No
- License
- 2922 (WI)
Specialties & taxonomies
Physician Assistants & Advanced Practice Nursing Providers
Physician Assistants & Advanced Practice Nursing Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
13 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
321 Medicare services, 2024 (ranked within specialty)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 99 | $104 |
| Established Patient Office Or Other Outpatient Visit With Low Level OD Decision Making, If Using Time, 20 Minutes Or More99213 | 68 | $55 |
| Established Patient Office Or Other Outpatient Visit With Moderate Level of Decision Making, If Using Time, 30 Minutes Or More99214 | 65 | $76 |
| Visit Complexity Inherent to Evaluation and Management Associated With Medical Care Services That Serve As the Continuing Focal Point for All Needed Health Care Services And/Or With Medical Care Services That Are Part of Ongoing Care Related to a Patient'SG2211 | 55 | $13 |
| Annual Wellness Visit, Includes a Personalized Prevention Plan of Service (pps), Subsequent VisitG0439 | 19 | $103 |
What this provider prescribes (Medicare Part D)
Top drugs by Medicare Part D claim volume, 2024 · 55 distinct drugs on file.
| Drug | Part D claims (2024) | Beneficiaries |
|---|---|---|
| Atorvastatin Calcium | 243 | 72 |
| Lisinopril | 128 | 43 |
| Levothyroxine Sodium | 119 | 39 |
| Omeprazole | 85 | 26 |
| Losartan Potassium | 78 | 28 |
| Metoprolol Succinate | 74 | 20 |
| Amlodipine Besylate |
Practice location
Mailing address
Registry dates
- Enumerated
- 2012-06-19
- Last updated
- 2014-01-10
Frequently asked questions
- What is Jennifer Shimshak's NPI number?
- Jennifer Shimshak's National Provider Identifier (NPI) is 1598028128, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Jennifer Shimshak's specialty?
- Jennifer Shimshak is listed in the NPPES registry with a primary specialty of Medical Physician Assistant (Physician Assistants & Advanced Practice Nursing Providers).
- Where is Jennifer Shimshak located?
- Jennifer Shimshak's practice location on file with NPPES is 3111 Gundersen Dr, Onalaska, WI 54650-8447.
- What is Jennifer Shimshak's phone number?
- The practice phone number listed in the NPPES registry for Jennifer Shimshak is (608) 775-8630.
- Does Jennifer Shimshak accept Medicare?
- Jennifer Shimshak is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Jennifer Shimshak's NPI active?
- Yes — Jennifer Shimshak's NPI (1598028128) is active in the NPPES registry as of the last update on 2014-01-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.