Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Lillian E Williams, PA-C

Physician Assistant in Mcallen, TX · enumerated 2007.

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

National Provider Identifier

1952501447

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Registry record

Entity type Individual (Type 1)

Name Lillian E Williams

Credential PA-C

Sex Female

Practice address 2101 S Cynthia St, Mcallen, TX, 78503

Phone (956) 687-7896

Fax (956) 687-2297

Enumeration date Jul 23, 2007

Last updated in NPPES Jun 26, 2020

Taxonomy & licenses

363A00000X Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License 1077607 (TX) Primary

Other identifiers

Identifier	Type	State	Issuer
PA05337	Other	TX	LICENSE
190946704	Medicaid	TX	-
1952501447	Other	TX	NPI
504737ZUQA	Other	TX	MEDICARE PROVIDER NUMBER

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 Lillian Williams practice?

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

What is the NPI number for Lillian Williams?

The National Provider Identifier (NPI) for Lillian Williams is 1952501447, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-06-26.