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

Mrs. Katherine Lynn Erstad, NP

Individual provider Family Nurse Practitioner · NPI 1497033609

Mrs. Katherine Lynn Erstad, NP is a Nurse Practitioner in Appleton, Wisconsin. Qualified in 2011, 15 years ago. Practices with Fox Valley Surgical Associates Ltd, a 35-clinician group and accepts Medicare assignment. Licensed in Texas and Wisconsin.

Years since qualifying
15
Licensed in
TX, WI
In the registry since
2011
Specialties on file
3
What do these letters mean?
NP — Nurse Practitioner
An advanced practice nurse who can diagnose, treat and in most states prescribe.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

145 W Calumet St
Appleton, WI 54915-4934
Phone: (920) 967-4141
Fax: (833) 972-1585
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Nurse Practitioner (primary) Taxonomy 363L00000X · Licence 4894-33 (WI)
Family Nurse Practitioner Taxonomy 363LF0000X · Licence TEMP (TX)
Family Nurse Practitioner Taxonomy 363LF0000X · Licence 4894 (WI)

Record details

NPI number1497033609
Entity typeIndividual (Type 1)
GenderFemale
Credentials NP
Sole proprietorNo
NPI enumeratedJuly 22, 2011
Last updated in NPPESNovember 13, 2024
Certification dateNovember 13, 2024

Medicare enrollment

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

Medicare specialtyNURSE PRACTITIONER
Medical schoolOTHER
Graduated 2011 (15 years in practice)
Group practice Fox Valley Surgical Associates Ltd — 35 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 $53 3 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 Fox Valley Surgical Associates Ltd

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 35 clinicians in the practice; 12 are shown here.

Other providers in Appleton