Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Sally Lynne Williams, PAC

Medical Physician Assistant in Mckinney, TX · enumerated 2007.

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

National Provider Identifier

1336330737

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Registry record

Entity type Individual (Type 1)

Name Sally Lynne Williams

Credential PAC

Sex Female

Practice address 5236 W University Dr Ste 1700, Mckinney, TX, 75071

Phone (972) 562-5999

Fax (972) 562-9755

Enumeration date Aug 9, 2007

Last updated in NPPES Jun 23, 2020

Taxonomy & licenses

363AM0700X Medical Physician Assistant Physician Assistants & Advanced Practice Nursing Providers · License PA04391 (TX) Primary

Other identifiers

Identifier	Type	State	Issuer
409380901	Medicaid	TX	-

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.

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Frequently asked questions

Is this the official NPI registry?

No. NPI Portal is a private site built on public CMS NPPES data. The official registry is npiregistry.cms.hhs.gov, operated by CMS.

What specialty is Sally Williams?

Sally Williams is registered in NPPES with the primary taxonomy of Medical Physician Assistant. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-06-23.