Johnni Riddar, LCDC

Primary specialty

Addiction (Substance Use Disorder) CounselorTaxonomy code 101YA0400X

License

17670 Issued in TX

Practice address

4700 Broadway St Ste 300
Galveston, TX 77551-4241

Phone

(346) 287-2520

NPI assigned

Feb 17, 2026

Sex

Female

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

State licenses

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

{
    "created_epoch": "1771286400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1773705600000",
    "number": "1700739075",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "1726 BROADWAY ST APT D19",
            "city": "GALVESTON",
            "state": "TX",
            "postal_code": "775504951",
            "telephone_number": "346-287-2520"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4700 BROADWAY ST STE 300",
            "city": "GALVESTON",
            "state": "TX",
            "postal_code": "775514241",
            "telephone_number": "346-287-2520"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "4444 W Main St",
            "address_purpose": "LOCATION",
            "city": "League City",
            "state": "TX",
            "postal_code": "775731737",
            "country_code": "US",
            "telephone_number": "409-763-2373",
            "fax_number": "409-978-2401",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "RIDDAR",
        "first_name": "JOHNNI",
        "credential": "LCDC",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2026-02-17",
        "last_updated": "2026-03-17",
        "certification_date": "2026-03-17",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101YA0400X",
            "taxonomy_group": "",
            "desc": "Counselor, Addiction (Substance Use Disorder)",
            "state": "TX",
            "license": "17670",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Julia Richardson, M.S., CCC-SLP
• Michael Preston Richier, M.D.
• Courtney Margaret Richman
• Dajonitta Richmond, M.D.
• Harold Austin Ricks, MD
• Adam Richard Riggs
• Jazelle Maria Rincon
• Mary Catherine Rincon, AUD
• Casey Dean Risinger, MD
• Maria del Mar Rivera Rolon, M.D.

• Addiction (Substance Use Disorder) Counselor in Galveston, TX
• Providers in Galveston, TX by specialty
• Addiction (Substance Use Disorder) Counselor in Texas

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 17, 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.