William Stephen Slavin, LLP LMSW

Primary specialty

PsychologistTaxonomy code 103T00000X

License

6301003757 Issued in MI

Practice address

105 Hall St
Suite a
Traverse City, MI 49684-2288

Phone

(231) 922-4850

Fax

(231) 935-3856

NPI assigned

Nov 2, 2006

Last updated

Sep 11, 2025By 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

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": "1162425600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1154409373",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "105 HALL ST",
            "address_2": "SUITE A",
            "city": "TRAVERSE CITY",
            "state": "MI",
            "postal_code": "496842288",
            "telephone_number": "231-922-4850",
            "fax_number": "231-935-3856"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "105 HALL ST",
            "address_2": "SUITE A",
            "city": "TRAVERSE CITY",
            "state": "MI",
            "postal_code": "496842288",
            "telephone_number": "231-922-4850",
            "fax_number": "231-935-3856"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SLAVIN",
        "first_name": "WILLIAM",
        "middle_name": "STEPHEN",
        "credential": "LLP LMSW",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2006-11-02",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103T00000X",
            "taxonomy_group": "",
            "desc": "Psychologist",
            "state": "MI",
            "license": "6301003757",
            "primary": true
        },
        {
            "code": "104100000X",
            "taxonomy_group": "",
            "desc": "Social Worker",
            "state": "MI",
            "license": "6801014929",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Stacy N Slade, PA
• Leslie Ellen Sladek
• Jill Slagal, PT
• Jason Dennis Slank, RN
• Laura Lee Slaughter, MSW
• Luna Meadow Slayer
• Sleep Diagnostics of Northern Michigan P C
• Steven E Slikkers, M.D.
• Jessica Lea Slocum, M.D.
• Nicklaus Karwas Slocum, M.D.

• Psychologist in Traverse City, MI
• Providers in Traverse City, MI by specialty
• Psychologist in Michigan

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 2025; 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.