Sierra Guenther, MSN, FNP

Primary specialty

Family Medicine PhysicianTaxonomy code 207Q00000X

License

F06261929 Issued in WI

Practice address

3925 N Gateway Dr
Appleton, WI 54913-7863

Phone

(920) 205-0279

NPI assigned

Jul 29, 2026

Sex

Female

Sole proprietor

No

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1785283200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1785283200000",
    "number": "1316869407",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "W5618 TONYS WAY",
            "city": "APPLETON",
            "state": "WI",
            "postal_code": "549152899",
            "telephone_number": "920-205-0279"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3925 N GATEWAY DR",
            "city": "APPLETON",
            "state": "WI",
            "postal_code": "549137863",
            "telephone_number": "920-205-0279"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GUENTHER",
        "first_name": "SIERRA",
        "credential": "MSN, FNP",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2026-07-29",
        "last_updated": "2026-07-29",
        "certification_date": "2026-07-29",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "WI",
            "license": "F06261929",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Joseph Frederick Grycowski, PHARM D
• Rachael E Grzywa, OTR/L
• Nancy L Gudex, NP
• Amanda M Gueldenzopf, LPC
• Andrea Guenther-Pal, LCSW
• William C Guenther Jr., M.D.
• Andrea Lane Guerrero, RN
• Kerri Elizabeth Guillen
• Jamee Guillory
• Rachel Renae Gulla

• Family Medicine Physician in Appleton, WI
• Providers in Appleton, WI by specialty
• Family Medicine Physician in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 29, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.