NPI Portal NPI Lookup & Verification

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

Gwendolyn Marie Niesen, MSW, LSW

Clinical Social Worker in Cincinnati, OH · enumerated 2023 · practices at Cymbria Hess Ma Inc..

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

National Provider Identifier

1356028567

Verified

See something wrong? Report a correction

Registry record

Entity type Individual (Type 1)
Name Gwendolyn Marie Niesen
Credential MSW, LSW
Sex Female
Practice address Cincinnati, OH, 45230
Phone (513) 233-0020
Enumeration date Jun 29, 2023
Last updated in NPPES Jun 29, 2023

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

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License S.1501332 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 Gwendolyn Niesen practice?
The practice location on file with NPPES is in Cincinnati, OH. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Gwendolyn Niesen?
The National Provider Identifier (NPI) for Gwendolyn Niesen is 1356028567, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

Browse all →

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2023-06-29.