Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Ms. Caroline Frazer Williams, MTBC

Music Therapist in Fairfax, VA · enumerated 2024.

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

National Provider Identifier

1427804137

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Registry record

Entity type Individual (Type 1)

Name Ms. Caroline Frazer Williams

Credential MTBC

Sex Female

Practice address 10306 Eaton Pl Ste 300, Fairfax, VA, 22030

Phone (571) 587-6244

Enumeration date Apr 24, 2024

Last updated in NPPES Apr 24, 2024

Taxonomy & licenses

225A00000X Music Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License 18667 (VA) Primary

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 Caroline Williams?

Caroline Williams is registered in NPPES with the primary taxonomy of Music Therapist. 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 2024-04-24.