William Davis Balbirnie, CATC I

Primary specialty

Addiction (Substance Use Disorder) CounselorTaxonomy code 101YA0400X

License

1128831 Issued in CA

Practice address

2131 E. 7TH St
National City, CA 91950

Phone

(949) 745-0138

NPI assigned

Sep 19, 2026

Last updated

Sep 29, 2026By the provider in NPPES

Sex

Male

Sole proprietor

Yes

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

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

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

{
    "created_epoch": "1789776000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1790640000000",
    "number": "1912819509",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "24 BEACON WAY",
            "city": "ALISO VIEJO",
            "state": "CA",
            "postal_code": "926562699",
            "telephone_number": "949-745-0138"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2131 E. 7TH ST",
            "city": "NATIONAL CITY",
            "state": "CA",
            "postal_code": "91950",
            "telephone_number": "949-745-0138"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "BALBIRNIE",
        "first_name": "WILLIAM",
        "middle_name": "DAVIS",
        "credential": "CATC I",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2026-09-19",
        "last_updated": "2026-09-29",
        "certification_date": "2026-09-29",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101YA0400X",
            "taxonomy_group": "",
            "desc": "Counselor, Addiction (Substance Use Disorder)",
            "state": "CA",
            "license": "1128831",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Addiction (Substance Use Disorder) Counselor in National City, CA
• Providers in National City, CA by specialty
• Addiction (Substance Use Disorder) Counselor in California

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