Matthew Geffen, DDS

Primary specialty

DentistTaxonomy code 122300000X

License

064965 Issued in NY

Practice address

800 Community Dr Ste 306
Manhasset, NY 11030-3821

Phone

(718) 224-9766

NPI assigned

Jul 4, 2023

Sex

Male

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

Medicare enrollment (NPD)

Not enrolled

State licenses

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

{
    "created_epoch": "1688428800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1771891200000",
    "number": "1730866443",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "800 COMMUNITY DR STE 306",
            "city": "MANHASSET",
            "state": "NY",
            "postal_code": "110303821",
            "telephone_number": "718-224-9766"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "800 COMMUNITY DR STE 306",
            "city": "MANHASSET",
            "state": "NY",
            "postal_code": "110303821",
            "telephone_number": "718-224-9766"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "345 E 24th St",
            "address_purpose": "LOCATION",
            "city": "New York",
            "state": "NY",
            "postal_code": "100104020",
            "country_code": "US",
            "telephone_number": "212-998-9800",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "101 South Dr",
            "address_purpose": "LOCATION",
            "city": "Stony Brook",
            "state": "NY",
            "postal_code": "117940001",
            "country_code": "US",
            "telephone_number": "631-632-8989",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "GEFFEN",
        "first_name": "MATTHEW",
        "name_prefix": "Dr.",
        "credential": "DDS",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2023-07-04",
        "last_updated": "2026-02-24",
        "certification_date": "2026-02-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "122300000X",
            "taxonomy_group": "",
            "desc": "Dentist",
            "state": "NY",
            "license": "064965",
            "primary": true
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Beatriz Diaz Gavin, CCC-SLP
• Evanthia Gavras
• Gary R. Gecelter, M.D.
• Madalina Gecui, M.D.
• Cristie Geddes, ANP
• Lee Geisen, PHD
• Robert Leonard Gekle, M.D.
• Adam Gelb, CRNA
• Gwenn Kudler Gelfand, LMSW
• Russell A Gellis

• Dentist in Manhasset, NY
• Providers in Manhasset, NY by specialty
• Dentist in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 24, 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.