Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

Mr. Chase M Isenberger, PA

Individual provider Physician Assistant · NPI 1891497020

Mr. Chase M Isenberger, PA is a Physician Assistant in Milwaukee, Wisconsin. Qualified in 2023, 3 years ago. Practices with Mercy Health System Corporation, a 751-clinician group, works from 3 locations and accepts Medicare assignment. Licensed in Illinois and Wisconsin.

Years since qualifying
3
Licensed in
IL, WI
In the registry since
2023
Specialties on file
2
What do these letters mean?
PA — Physician Assistant
A licensed clinician who examines, diagnoses and treats under a physician's supervision.

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Practice location Address checks out

2801 W Kinnickinnic River Pkwy
Milwaukee, WI 53215-3669
Phone: (414) 385-1922
Fax: (414) 385-1899
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (2)

  • 538 Old Highway 70 4, White Bluff, TN 37187-4703 — (608) 290-8189
  • 1000 Mineral Point Ave, Janesville, WI 53548-2940 — (608) 756-6868

Specialties & licences

Physician Assistant (primary) Taxonomy 363A00000X · Licence 8359 (WI)
Physician Assistant Taxonomy 363A00000X · Licence 085010417 (IL)

Record details

NPI number1891497020
Entity typeIndividual (Type 1)
GenderMale
Credentials PA
Sole proprietorNo
NPI enumeratedMarch 21, 2023
Last updated in NPPESSeptember 29, 2026
Certification dateSeptember 29, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPHYSICIAN ASSISTANT
Medical schoolOTHER
Graduated 2023 (3 years in practice)
Group practice Mercy Health System Corporation — 751 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $20 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician.

  • Mercy Health System Corp Hospital · Janesville, WI

Colleagues at Mercy Health System Corporation

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 751 clinicians in the practice; 12 are shown here.

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