Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Il Dept. of Human Services

Q: What type of organization is Il Dept. of Human Services?

Il Dept. of Human Services is registered in NPPES as a Psychiatric Hospital Unit (its primary provider taxonomy).

Psychiatric Hospital Unit in Chester, IL · enumerated 2007 · authorized official Michelle Zimmer, Patient Resource Unit Supervisor.

Data current as of Jul 13, 2026 · sourced from CMS NPPES

National Provider Identifier

1215062112

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Registry record

Entity type Organization (Type 2)

Legal business name Il Dept. of Human Services

Other name <Unavail>

Practice address 1315 Lehmen Dr, Chester, IL, 62233

Phone (618) 826-4571

Fax (618) 826-3229

Enumeration date Feb 22, 2007

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

273R00000X Psychiatric Hospital Unit Hospital Units Primary

Authorized official

Name Michelle Zimmer

Title Patient Resource Unit Supervisor

Phone (618) 826-4571

What is an NPI number?

A National Provider Identifier (NPI) is a unique 10-digit number that CMS assigns to every U.S. healthcare provider and organization under HIPAA. Type 1 NPIs identify individual providers; Type 2 NPIs identify organizations. The NPI appears on insurance claims, prescriptions, and credentialing paperwork, and never changes, even if the provider moves or changes specialty.

Read the full guide → Validate an NPI →

Frequently asked questions

What is a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is Il Dept. of Human Services?

Il Dept. of Human Services is registered in NPPES as a Psychiatric Hospital Unit (its primary provider taxonomy).

Providers at this address

Browse all →

Nageswararao Vallabhaneni Psychiatry Physician · Chester, IL NPI 1215925656 Alan Felthous Psychiatry Physician · Chester, IL NPI 1164410502 Illinois Department of Human Services Psychiatric Hospital · Chester, IL NPI 1306834726 Prithviraj Thakur Psychiatry Physician · Chester, IL NPI 1801884226 Prem Dua Pediatrics Physician · Chester, IL NPI 1952399396 Marie-Ange Sainvilus Obstetrics & Gynecology Physician · Chester, IL NPI 1083602072 Dorothy Zajac Internal Medicine Physician · Chester, IL NPI 1972592210 Susan Carr Family Medicine Physician · Chester, IL NPI 1982693925

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.