Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Clifton L Williams, MD

Specialist in Spartanburg, SC · enumerated 2006.

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

National Provider Identifier

1326009606

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Registry record

Entity type Individual (Type 1)

Name Clifton L Williams

Credential MD

Sex Male

Practice address 391 Serpentine Dr, Suite 500, Spartanburg, SC, 29303

Phone (864) 585-8221

Fax (864) 216-4290

Enumeration date Mar 28, 2006

Last updated in NPPES Jan 10, 2008

Taxonomy & licenses

174400000X Specialist Other Service Providers · License 10396 (SC) Primary

MD · Doctor of Medicine: A physician who completed medical school (allopathic medicine), residency training, and state licensure. About the MD credential

Other identifiers

Identifier	Type	State	Issuer
103961	Medicaid	SC	-

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 Clifton Williams?

The National Provider Identifier (NPI) for Clifton Williams is 1326009606, a Type 1 (individual) record in the CMS NPPES registry.

Where does Clifton Williams practice?

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

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2008-01-10.