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

Patrick J Hassemer, NP

Individual provider Registered Nurse · NPI 1871808956

Patrick J Hassemer, NP is a Nurse Practitioner in Eau Claire, Wisconsin. Graduated from University of Wisconsin School of Medicine in 2010, 16 years ago. Practices with Mayo Clinic Health System-Northwest Wisconsin Region Inc, a 799-clinician group and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
16
Trained at
University of Wisconsin School of Medicine
Licensed in
WI
In the registry since
2010
Specialties on file
2
What do these letters mean?
NP — Nurse Practitioner
An advanced practice nurse who can diagnose, treat and in most states prescribe.

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Practice location Address checks out

1400 Bellinger St
Eau Claire, WI 54703-5222
Phone: (715) 838-5222
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence 4137 (WI)
Registered Nurse Taxonomy 163W00000X · Licence 141783 (WI)

Record details

NPI number1871808956
Entity typeIndividual (Type 1)
GenderMale
Credentials NP
Sole proprietorNo
NPI enumeratedAugust 12, 2010
Last updated in NPPESAugust 29, 2022
Certification dateAugust 29, 2022

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolUNIVERSITY OF WISCONSIN SCHOOL OF MEDICINE
Graduated 2010 (16 years in practice)
Group practice Mayo Clinic Health System-Northwest Wisconsin Region Inc — 799 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients219
Services billed 907 a service is one billed item, such as a visit, a test or a procedure
Average patient age73

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Mayo Clinic Health System-Red Cedar Inc Hospital · Menomonie, WI · listed as Mayo Clinic Health System-Northwest Wisconsin Region, Inc
  • Mayo Clinic Health System Chippewa Valley Hospital · Bloomer, WI
  • Mayo Clinic Health System Eau Claire Hospital Hospital · Eau Claire, WI

Colleagues at Mayo Clinic Health System-Northwest Wisconsin Region Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 799 clinicians in the practice; 12 are shown here.

Other providers in Eau Claire