Donald O Tessmer, PSY.D.

Primary specialty

School PsychologistTaxonomy code 103TS0200X

License

LEP 1817 Issued in CA

Practice address

10436 Santa Monica Blvd
3005
Los Angeles, CA 90025-6933

Phone

(310) 393-2626

NPI assigned

Apr 26, 2007

Sex

Male

Sole proprietor

Yes

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": "1177545600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1740400530",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4640 GLENCOE AVE APT 5",
            "city": "MARINA DEL REY",
            "state": "CA",
            "postal_code": "902926388",
            "telephone_number": "310-827-4307"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "10436 SANTA MONICA BLVD",
            "address_2": "3005",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900256933",
            "telephone_number": "310-393-2626"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "TESSMER",
        "first_name": "DONALD",
        "middle_name": "O",
        "name_prefix": "Dr.",
        "credential": "PSY.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2007-04-26",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "103T00000X",
            "taxonomy_group": "",
            "desc": "Psychologist",
            "state": "CA",
            "license": "LEP",
            "primary": false
        },
        {
            "code": "103TS0200X",
            "taxonomy_group": "",
            "desc": "Psychologist, School",
            "state": "CA",
            "license": "LEP 1817",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• School Psychologist in Los Angeles, CA
• Providers in Los Angeles, CA by specialty
• School Psychologist in California

• 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.