Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Debbie Ann Williams, LCSW

Social Worker in Dallas, TX · enumerated 2006.

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

National Provider Identifier

1679526859

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Registry record

Entity type Individual (Type 1)

Name Ms. Debbie Ann Williams

Credential LCSW

Sex Female

Practice address 4500 S. Lancaster Rd., Mental Health Department (116a), Dallas, TX, 75216

Phone (214) 857-1048

Fax (972) 499-1275

Enumeration date May 18, 2006

Last updated in NPPES Sep 23, 2020

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 25887 (TX) Primary

LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW credential

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

Is NPI 1679526859 active?

Yes, as of the latest NPPES snapshot, NPI 1679526859 is active (record last updated 2020-09-23).

How do I verify Debbie Williams's NPI record?

Cross-check NPI 1679526859 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-09-23.