Individual provider Active NPI

Diane Marie Gilliard, LCPC, CADC

  • Mental Health Counselor
  • Oak Park, IL
National Provider Identifier
1609984285
Registry record updated Sep 11, 2025
On this page

Key facts

NPPES NPI Registry
Primary specialty
Mental Health CounselorTaxonomy code 101YM0800X
Practice address
120 S Marion St
4TH Floor
Oak Park, IL 60302-2809
Phone
(708) 406-3105
NPI assigned
Aug 25, 2006
Sex
Female
Sole proprietor
Yes

NPPES NPI Registry

Updated by the provider on Sep 11, 2025

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Addiction (Substance Use Disorder) Counselor 101YA0400X 13726 IL
Mental Health Counselor 101YM0800X IL Primary

Addresses

Primary practice location

120 S Marion St
4TH Floor
Oak Park, IL 60302-2809

Mailing address

714 S Fairfield Ave
Lombard, IL 60148-3504
Phone (630) 620-4327

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Not enrolled

State licenses

LicenseStateTypeSpecialty
180-002301ILMDMental Health Counselor
13726ILMDDoula

NPI Registry JSON

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

{
    "created_epoch": "1156464000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1609984285",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "714 S FAIRFIELD AVE",
            "city": "LOMBARD",
            "state": "IL",
            "postal_code": "601483504",
            "telephone_number": "630-620-4327"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "120 S MARION ST",
            "address_2": "4TH FLOOR",
            "city": "OAK PARK",
            "state": "IL",
            "postal_code": "603022809",
            "telephone_number": "708-406-3105"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GILLIARD",
        "first_name": "DIANE",
        "middle_name": "MARIE",
        "name_prefix": "Ms.",
        "credential": "LCPC, CADC",
        "sole_proprietor": "YES",
        "sex": "F",
        "enumeration_date": "2006-08-25",
        "last_updated": "2025-09-11",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "101YA0400X",
            "taxonomy_group": "",
            "desc": "Counselor, Addiction (Substance Use Disorder)",
            "state": "IL",
            "license": "13726",
            "primary": false
        },
        {
            "code": "101YM0800X",
            "taxonomy_group": "",
            "desc": "Counselor, Mental Health",
            "state": "IL",
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in Oak Park, IL

Sources for this page

  • 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.