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

Ms. Catherine Schmidt Williams, LCSW

Clinical Social Worker in Austin, TX · enumerated 2007.

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

National Provider Identifier

1891986774

Verified

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Registry record

Entity type Individual (Type 1)

Name Ms. Catherine Schmidt Williams

Credential LCSW

Sex Female

Practice address Austin, TX, 78753

Phone (512) 736-4458

Enumeration date Aug 6, 2007

Last updated in NPPES May 31, 2012

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 36424 (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

What is the NPI number for Catherine Williams?

The National Provider Identifier (NPI) for Catherine Williams is 1891986774, a Type 1 (individual) record in the CMS NPPES registry.

Where does Catherine Williams practice?

The practice location on file with NPPES is in Austin, 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 2012-05-31.