Thomas David Seifert, CADC-I

Primary specialty

Addiction (Substance Use Disorder) CounselorTaxonomy code 101YA0400X

License

CI49561125 Issued in CA

Practice address

1640 Superior Ave
Costa Mesa, CA 92627-3652

Phone

(916) 358-0757

NPI assigned

Nov 13, 2025

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": "1762992000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1767830400000",
    "number": "1932069721",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "575 W 19TH ST APT H172",
            "city": "COSTA MESA",
            "state": "CA",
            "postal_code": "926275052",
            "telephone_number": "916-358-0757"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1640 SUPERIOR AVE",
            "city": "COSTA MESA",
            "state": "CA",
            "postal_code": "926273652",
            "telephone_number": "916-358-0757"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SEIFERT",
        "first_name": "THOMAS",
        "middle_name": "DAVID",
        "credential": "CADC-I",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2025-11-13",
        "last_updated": "2026-01-08",
        "certification_date": "2026-01-08",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101YA0400X",
            "taxonomy_group": "",
            "desc": "Counselor, Addiction (Substance Use Disorder)",
            "state": "CA",
            "license": "CI49561125",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Addiction (Substance Use Disorder) Counselor in Costa Mesa, CA
• Providers in Costa Mesa, 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 Jan 8, 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.