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

Margot R. Walker, APRN, WHNP-BC

Individual provider Nurse Practitioner · NPI 1548312028

Margot R. Walker, APRN, WHNP-BC is a Nurse Practitioner in Janesville, Wisconsin. Qualified in 2000, 26 years ago. Practices with Mercy Health System Corporation, a 751-clinician group and accepts Medicare assignment. Licensed in Wisconsin.

Years since qualifying
26
Licensed in
WI
In the registry since
2007
What do these letters mean?
APRN — Advanced Practice Registered Nurse
The umbrella licence covering nurse practitioners, midwives, anaesthetists and clinical nurse specialists.

See every abbreviation used in this directory →

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Practice location Address checks out

1000 Mineral Point Ave
Janesville, WI 53548-2940
Phone: (608) 756-6890
Fax: (608) 756-6164
Show map & directions

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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 1847 (WI)

Record details

NPI number1548312028
Entity typeIndividual (Type 1)
GenderFemale
Credentials APRN , WHNP-BC
Sole proprietorNo
NPI enumeratedJanuary 17, 2007
Last updated in NPPESSeptember 29, 2022
Certification dateSeptember 29, 2022

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2000 (26 years in practice)
Group practice Mercy Health System Corporation — 751 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 patients291
Services billed 440 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.

  • Mercy Health System Corp Hospital · Janesville, WI
  • Mercy Walworth Hospital & Medical Center Hospital · Lake Geneva, 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.

Other providers in Janesville