Gregory N Wiersema, MST-CCC/A

Primary specialty

AudiologistTaxonomy code 231H00000X

License

55-156 Issued in WI

Practice address

221 Fond Du Lac Ave
Fond Du Lac, WI 54935-5303

Phone

(920) 923-4678

Fax

(920) 923-4678

NPI assigned

Jun 21, 2005

Last updated

Jul 13, 2026By the provider in NPPES

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Other identifiers 1

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

State licenses

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

{
    "created_epoch": "1119312000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1831195361",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "221 FOND DU LAC AVE",
            "city": "FOND DU LAC",
            "state": "WI",
            "postal_code": "549355303",
            "telephone_number": "920-923-4678",
            "fax_number": "920-923-4678"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "221 FOND DU LAC AVE",
            "city": "FOND DU LAC",
            "state": "WI",
            "postal_code": "549355303",
            "telephone_number": "920-923-4678",
            "fax_number": "920-923-4678"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "WIERSEMA",
        "first_name": "GREGORY",
        "middle_name": "N",
        "credential": "MST-CCC/A",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-06-21",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "231H00000X",
            "taxonomy_group": "",
            "desc": "Audiologist",
            "state": "WI",
            "license": "55-156",
            "primary": true
        },
        {
            "code": "237600000X",
            "taxonomy_group": "",
            "desc": "Audiologist-Hearing Aid Fitter",
            "state": "WI",
            "license": "55-156",
            "primary": false
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "41105900",
            "state": "WI"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Tonille Marie Westphal, BSN, RN, CNE
• Joanell K Wheeler, M.D.
• Kurt Whittet, D.M.D.
• Sheri Whitty
• Kimberly Wickert, LPC-IT
• Gabrielle Marie Wiese
• Wendy E Wiese, CRNA
• Margaret Wiesen
• Laureen Wiest
• Trisha Wilbert, PTA

• Audiologist in Fond Du Lac, WI
• Providers in Fond Du Lac, WI by specialty
• Audiologist in Wisconsin

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 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.