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

Ms. Gwendolyn Armstrong Johnson, LMSW

Clinical Social Worker in Desoto, TX · enumerated 2006.

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

National Provider Identifier

1558371666

Verified

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Registry record

Entity type Individual (Type 1)

Name Ms. Gwendolyn Armstrong Johnson

Credential LMSW

Sex Female

Practice address Desoto, TX, 75115

Phone (972) 223-3887

Enumeration date Aug 9, 2006

Last updated in NPPES Jul 8, 2007

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 S10089 (TX) 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

What is the NPI number for Gwendolyn Johnson?

The National Provider Identifier (NPI) for Gwendolyn Johnson is 1558371666, a Type 1 (individual) record in the CMS NPPES registry.

Where does Gwendolyn Johnson practice?

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

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.