Matthew R. Williams, LCSW

Primary specialty

Clinical Social WorkerTaxonomy code 1041C0700X

License

27812 Issued in CA

Practice address

651 I St
Sacramento, CA 95814-2400

Phone

(916) 874-6172

Fax

(916) 854-9194

NPI assigned

Jul 14, 2008

Sex

Male

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

State licenses

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

{
    "created_epoch": "1215993600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1765843200000",
    "number": "1780848358",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "711 G ST",
            "city": "SACRAMENTO",
            "state": "CA",
            "postal_code": "958141212",
            "telephone_number": "916-874-6172",
            "fax_number": "916-854-9194"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "651 I ST",
            "city": "SACRAMENTO",
            "state": "CA",
            "postal_code": "958142400",
            "telephone_number": "916-874-6172",
            "fax_number": "916-854-9194"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "12500 Bruceville Rd",
            "address_purpose": "LOCATION",
            "city": "Elk Grove",
            "state": "CA",
            "postal_code": "957579784",
            "country_code": "US",
            "telephone_number": "916-874-6172",
            "fax_number": "916-854-9194",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "WILLIAMS",
        "first_name": "MATTHEW",
        "middle_name": "R.",
        "name_prefix": "Mr.",
        "credential": "LCSW",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2008-07-14",
        "last_updated": "2025-12-16",
        "certification_date": "2025-12-16",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "1041C0700X",
            "taxonomy_group": "",
            "desc": "Social Worker, Clinical",
            "state": "CA",
            "license": "27812",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Luisa Ann Williams, M.A.
• Marcella Marie Williams, LCSW
• Marche A Williams, MFT
• Marcus Williams
• Marianna Williams
• Melissa Williams
• Melissa J Williams, M.D.
• Monique Fullard Williams, M.A
• Natalie Williams
• Nicholas Williams Sr.

• Clinical Social Worker in Sacramento, CA
• Providers in Sacramento, CA by specialty
• Clinical Social Worker in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Dec 16, 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.