John J Dioguardi, CASAC

Primary specialty

Addiction (Substance Use Disorder) CounselorTaxonomy code 101YA0400X

Practice address

256 Washington St
Mount Vernon, NY 10553-1052

Phone

(888) 750-2266

NPI assigned

Jul 2, 2026

Last updated

Jul 2, 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

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

{
    "created_epoch": "1782950400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1782950400000",
    "number": "1669399341",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "15 FORTUNE RD",
            "city": "WEST MIDDLETOWN",
            "state": "NY",
            "postal_code": "10941",
            "telephone_number": "888-750-2266"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "256 WASHINGTON ST",
            "city": "MOUNT VERNON",
            "state": "NY",
            "postal_code": "105531052",
            "telephone_number": "888-750-2266"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DIOGUARDI",
        "first_name": "JOHN",
        "middle_name": "J",
        "credential": "CASAC",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2026-07-02",
        "last_updated": "2026-07-02",
        "certification_date": "2026-06-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101YA0400X",
            "taxonomy_group": "",
            "desc": "Counselor, Addiction (Substance Use Disorder)",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Yelidad Diaz
• Steve A Dicairano, M.D.
• Rachel Nicole Dievendorf
• Janeen Anne Dilkes, FNP, RN
• Marjorie Lynne Dingee, LCSW
• Debbi-Ann Dixon
• Marva Dolphin
• Loretta Dolphus II
• Sabrina Dominique, MS CCC-SLP
• Constance Douglas, LCSW

• Addiction (Substance Use Disorder) Counselor in Mount Vernon, NY
• Providers in Mount Vernon, NY by specialty
• Addiction (Substance Use Disorder) Counselor in New York

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 2, 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.