Active NPI
Willow Troy Messier, LCPC, ATR-BC, CCLS
- Mental Health Counselor
- Chicago, IL
National Provider Identifier
1851250765
On this page
Key facts
NPPES NPI Registry- Primary specialty
- Mental Health Counselor
- License
- 180.017400
- Practice address
- 1726 W Glenlake Ave
Chicago, IL 60660-2582 - Phone
- (917) 743-4479
- NPI assigned
- Jan 16, 2026
- Sex
- Female
- Sole proprietor
- Yes
NPPES NPI Registry
Registry information is reported by the provider to CMS and is not verified. About this source
Specialties & licenses 1
| Specialty (taxonomy) | Code | License | State | Primary |
|---|---|---|---|---|
| Mental Health Counselor | 101YM0800X | 180.017400 | IL | Primary |
Addresses
Primary practice location
1726 W Glenlake Ave
Chicago, IL 60660-2582
Mailing address
1726 W Glenlake Ave
Chicago, IL 60660-2582
Phone (917) 743-4479
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
| License | State | Type | Specialty |
|---|---|---|---|
| 180.017400 | IL | MD | Mental Health Counselor |
NPI Registry JSON
The complete NPPES record for this NPI in the NPI Registry API format.
{
"created_epoch": "1768521600000",
"enumeration_type": "NPI-1",
"last_updated_epoch": "1768521600000",
"number": "1851250765",
"addresses": [
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "MAILING",
"address_type": "DOM",
"address_1": "1726 W GLENLAKE AVE",
"city": "CHICAGO",
"state": "IL",
"postal_code": "606602582",
"telephone_number": "917-743-4479"
},
{
"country_code": "US",
"country_name": "United States",
"address_purpose": "LOCATION",
"address_type": "DOM",
"address_1": "1726 W GLENLAKE AVE",
"city": "CHICAGO",
"state": "IL",
"postal_code": "606602582",
"telephone_number": "917-743-4479"
}
],
"practiceLocations": [],
"basic": {
"last_name": "MESSIER",
"first_name": "WILLOW",
"middle_name": "TROY",
"name_prefix": "Mrs.",
"credential": "LCPC, ATR-BC, CCLS",
"sole_proprietor": "YES",
"sex": "F",
"enumeration_date": "2026-01-16",
"last_updated": "2026-01-16",
"certification_date": "2026-01-16",
"status": "A"
},
"taxonomies": [
{
"code": "101YM0800X",
"taxonomy_group": "",
"desc": "Counselor, Mental Health",
"state": "IL",
"license": "180.017400",
"primary": true
}
],
"identifiers": [],
"endpoints": [],
"other_names": []
}Other providers in Chicago, IL
Sources for this page
- NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jan 16, 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.