Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Janine Marie Ahrens, APNP

Individual provider Nurse Practitioner · NPI 1659390896

Janine Marie Ahrens, APNP is a Nurse Practitioner in Waukesha, Wisconsin. Qualified in 1999, 27 years ago. Practices with Nephrology Associates SC, an 8-clinician group and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
27
Licensed in
WI
In the registry since
2006
Specialties on file
2
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Practice location Address checks out

1260 Sentry Dr Ste 140
Waukesha, WI 53186-5990
Phone: (262) 524-1024
Fax: (262) 524-8767
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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 1559 (WI)
Adult Health Nurse Practitioner Taxonomy 363LA2200X · Licence 1559-33 (WI)

Record details

NPI number1659390896
Entity typeIndividual (Type 1)
GenderFemale
Credentials APNP
Sole proprietorNo
NPI enumeratedJuly 19, 2006
Last updated in NPPESFebruary 5, 2026
Certification dateFebruary 5, 2026

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 1999 (27 years in practice)
Group practice Nephrology Associates Sc — 8 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 patients20
Services billed 23 a service is one billed item, such as a visit, a test or a procedure
Average patient age81

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.

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 $339 11 payments · 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.

Colleagues at Nephrology Associates SC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice.

Other providers in Waukesha