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

Kate E Willhardt, APN

Individual provider Nurse Practitioner · NPI 1619621604

Kate E Willhardt, APN is a Nurse Practitioner in Peoria, Illinois. Qualified in 2021, 5 years ago. Practices with Oncology-Hematology Associates of Central Illinois P C, a 64-clinician group and accepts Medicare assignment. Licensed in Illinois.

Years since qualifying
5
Licensed in
IL
In the registry since
2022
What do these letters mean?
APN — Advanced Practice Nurse
The umbrella title some states use for nurse practitioners and other advanced practice nurses.

See every abbreviation used in this directory →

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Practice location Address checks out

8940 N Wood Sage Rd
Peoria, IL 61615-7822
Phone: (309) 243-3610
Fax: (309) 243-3040
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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 209024742 (IL)

Record details

NPI number1619621604
Entity typeIndividual (Type 1)
GenderFemale
Credentials APN
Sole proprietorNo
NPI enumeratedFebruary 8, 2022
Last updated in NPPESMarch 2, 2026
Certification dateMarch 2, 2026

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2021 (5 years in practice)
Group practice Oncology-Hematology Associates Of Central Illinois P C — 64 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 patients337
Services billed 2,843 a service is one billed item, such as a visit, a test or a procedure
Average patient age75

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.

Colleagues at Oncology-Hematology Associates of Central Illinois P C

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 64 clinicians in the practice; 12 are shown here.

Other providers in Peoria