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Newly Listed Provider — this NPI profile has been added to the NPI registry within the last 90 days.

SIERRA R GUENTHER MSN, FNP
NPI 1316869407
Nurse Practitioner - Family in Appleton, WI

Active since July 29, 2026
3925 N GATEWAY DR, APPLETON, WI 54913(920) 205-0279 Get Directions Write a Review

NPPES record added: October 1, 2026. Verified against the NPPES registry weekly; last sync: October 04, 2026.

Record update history: Oct 1, 2026, Jul 29, 2026 (2 updates tracked since 2026).

About Sierra R Guenther Msn, Fnp NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

SIERRA R GUENTHER MSN, FNP (NPI 1316869407) is an individual family provider in Appleton, Wisconsin, licensed in Wisconsin (18624) and active in the NPI registry since July 2026.

NPPES Registry Identity

NPI1316869407
Entity TypeIndividualFemale
Primary Taxonomy363LF0000X
Provider Legal NameSIERRA R GUENTHERCredential: MSN, FNP
Location Address3925 N GATEWAY DRAppleton, WI 54913-7863
Mailing Address3 Neenah CtrNeenah, WI 54956-3070 · (920) 830-5900 · Fax (920) 830-5910
Phone(920) 205-0279
Sole ProprietorNo
Enumeration DateJuly 29, 2026
Last NPPES UpdateOctober 1, 20262 updates tracked since enumeration
NPPES CertifiedOctober 1, 2026
✔ NPI 1316869407 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyNurse Practitioner · FamilyPhysician Assistants & Advanced Practice Nursing Providers
Taxonomy Code363LF0000X
License✔ Licensed in WI · 18624
3925 N GATEWAY DR, Appleton, WI 54913
Open in Google Maps ↗

Other Providers at the Same Location NPPES 20

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

FOX VALLEY HEMATOLOGY & ONCOLOGY S C
Pharmacy (Community/Retail Pharmacy)
3925 N GATEWAY DR, SUITE 100
APPLETON, WI 54913
Outagamie County (920) 702-4802
BRITTANY E GOODRICH-BRAUN
Family Medicine
3925 N GATEWAY DR
APPLETON, WI 54913
Outagamie County (920) 830-6877
STEVEN R HAMEL APN FP-C
Nurse Practitioner (Family)
3925 N GATEWAY DR
APPLETON, WI 54913
Outagamie County (920) 830-6877
HEATHER SCHEELK DNP, FNP-BC
Nurse Practitioner (Family)
3925 N GATEWAY DR
APPLETON, WI 54913
Outagamie County (920) 840-4258
DIRK STEINERT MD
Internal Medicine
3925 N GATEWAY DR
APPLETON, WI 54913
Outagamie County (920) 830-6877
SABA R KHAN DO
Family Medicine
3925 N GATEWAY DR
APPLETON, WI 54913
Outagamie County (920) 702-6371
MS. CYNTHIA FRANCES SUSEDIK D.O.
Family Medicine
3925 N GATEWAY DR
APPLETON, WI 54913
Outagamie County (920) 830-6877
KATHLEEN M ERDAHL
Nurse Practitioner (Family)
3925 N GATEWAY DR
APPLETON, WI 54913
Outagamie County (920) 830-6877

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Sierra Guenther's NPI number?

The NPI number for Sierra Guenther is 1316869407. It was assigned to this individual provider in the NPPES registry on July 29, 2026.

Where is Sierra Guenther located?

Sierra Guenther practices at 3925 N Gateway Dr, Appleton, WI 54913. The listed phone number is (920) 205-0279.

What is Sierra Guenther's specialty?

The primary specialty registered for this NPI is Nurse Practitioner, specializing in Family, with taxonomy code 363LF0000X.

When was this NPI record last updated?

The NPPES record for Sierra Guenther was last updated on October 1, 2026. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 7 days ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.