Katherine Nguyen Williams, PH.D.

Primary specialty

PsychologistTaxonomy code 103T00000X

License

PSY22387 Issued in CA

Practice address

3665 Kearny Villa Rd
Suite 101
San Diego, CA 92123-1953

Phone

(858) 966-5832

Fax

(858) 966-6733

NPI assigned

Jul 2, 2007

Sex

Female

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

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: No
• Power mobility devices: No
• Hospice: No

Green means eligible to order or refer.

Specialty

Clinical Psychologist

Education

Other, 2006

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Philosophy

State licenses

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

{
    "created_epoch": "1183334400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1784073600000",
    "number": "1033316005",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3020 CHILDRENS WAY",
            "address_2": "MC 5018",
            "city": "SAN DIEGO",
            "state": "CA",
            "postal_code": "921234223",
            "telephone_number": "858-966-5832",
            "fax_number": "858-966-6733"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3665 KEARNY VILLA RD",
            "address_2": "SUITE 101",
            "city": "SAN DIEGO",
            "state": "CA",
            "postal_code": "921231953",
            "telephone_number": "858-966-5832",
            "fax_number": "858-966-6733"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "8950 Villa La Jolla Dr Ste C101",
            "address_purpose": "LOCATION",
            "city": "LA Jolla",
            "state": "CA",
            "postal_code": "920371727",
            "country_code": "US",
            "telephone_number": "800-926-8273",
            "fax_number": "888-539-8781",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "200 W Arbor Dr",
            "address_purpose": "LOCATION",
            "city": "San Diego",
            "state": "CA",
            "postal_code": "921039000",
            "country_code": "US",
            "telephone_number": "800-926-8273",
            "fax_number": "888-539-8781",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "WILLIAMS",
        "first_name": "KATHERINE",
        "middle_name": "NGUYEN",
        "name_prefix": "Dr.",
        "credential": "PH.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2007-07-02",
        "last_updated": "2026-07-15",
        "certification_date": "2026-07-15",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103TC2200X",
            "taxonomy_group": "",
            "desc": "Psychologist, Clinical Child & Adolescent",
            "state": "CA",
            "license": "PSY22387",
            "primary": false
        },
        {
            "code": "103T00000X",
            "taxonomy_group": "",
            "desc": "Psychologist",
            "state": "CA",
            "license": "PSY22387",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Kaliya Williams, RN
• Karen Denise Williams
• Karl Eric Williams, PTA
• Karsyn Rae Williams
• Katherine Williams, NMD
• Kathryn Williams, PH.D.
• Katie Williams
• Kaylee Williams
• Keith Williams Jr.
• Kelly Williams

• Psychologist in San Diego, CA
• Providers in San Diego, CA by specialty
• Psychologist in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 15, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.