Thomas Spalding Sympson, D.D.S.

Primary specialty

Orthodontics and Dentofacial Orthopedics DentistryTaxonomy code 1223X0400X

License

11151 Issued in MD

Practice address

6900 Georgia Ave. NW
Building 2, Room 1D02
Washington, DC 20307-5400

Phone

(202) 782-6815

Fax

(202) 782-6987

NPI assigned

Dec 9, 2005

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": "1134086400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1043295231",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "6900 GEORGIA AVE. NW",
            "address_2": "BUILDING T20. ROOM 206A",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "203075400",
            "telephone_number": "202-782-6815",
            "fax_number": "202-782-9195"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "6900 GEORGIA AVE. NW",
            "address_2": "BUILDING 2, ROOM 1D02",
            "city": "WASHINGTON",
            "state": "DC",
            "postal_code": "203075400",
            "telephone_number": "202-782-6815",
            "fax_number": "202-782-6987"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SYMPSON",
        "first_name": "THOMAS",
        "middle_name": "SPALDING",
        "name_prefix": "Dr.",
        "credential": "D.D.S.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-12-09",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "1223X0400X",
            "taxonomy_group": "",
            "desc": "Dentist, Orthodontics and Dentofacial Orthopedics",
            "state": "MD",
            "license": "11151",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

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• Orthodontics and Dentofacial Orthopedics Dentistry in Washington, DC
• Providers in Washington, DC by specialty
• Orthodontics and Dentofacial Orthopedics Dentistry in District of Columbia

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 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.