Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mrs. Gwen M Donley

Q: What is the NPI number for Gwen Donley?

The National Provider Identifier (NPI) for Gwen Donley is 1528811015, a Type 1 (individual) record in the CMS NPPES registry.

Professional Counselor in O Fallon, IL · enumerated 2024.

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

National Provider Identifier

1528811015

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Registry record

Entity type Individual (Type 1)

Name Mrs. Gwen M Donley

Sex Female

Practice address O Fallon, IL, 62269

Phone (618) 803-8173

Enumeration date Apr 8, 2024

Last updated in NPPES Apr 8, 2024

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

101YP2500X Professional Counselor Behavioral Health & Social Service Providers · License 2024003430 (MO) Primary

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

Where does Gwen Donley practice?

The practice location on file with NPPES is in O Fallon, IL. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for Gwen Donley?

The National Provider Identifier (NPI) for Gwen Donley is 1528811015, a Type 1 (individual) record in the CMS NPPES registry.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2024-04-08.