Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Phyllis H Williamson, A.C.N.P.

Acute Care Nurse Practitioner in Columbia, SC · enumerated 2005 · practices at Palmetto Health - University of South Carolina Medical Group.

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

National Provider Identifier

1962404780

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Registry record

Entity type Individual (Type 1)

Name Phyllis H Williamson

Credential A.C.N.P.

Sex Female

Practice address 8 Richland Medical Park Dr Ste 100, Columbia, SC, 29203

Phone (803) 434-3800

Enumeration date Aug 11, 2005

Last updated in NPPES Nov 2, 2018

Taxonomy & licenses

363L00000X Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License APN1183 (SC) Secondary

363LA2100X Acute Care Nurse Practitioner Physician Assistants & Advanced Practice Nursing Providers · License APN1183 (SC) Primary

Other identifiers

Identifier	Type	State	Issuer
NP0654	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 Phyllis Williamson?

The National Provider Identifier (NPI) for Phyllis Williamson is 1962404780, a Type 1 (individual) record in the CMS NPPES registry.

Where does Phyllis Williamson practice?

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

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2018-11-02.