Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Olivia Jeanne Hamilton, MSW, LCSW

Social Worker in Worcester, MA · enumerated 2024.

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

National Provider Identifier

1942048350

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Registry record

Entity type Individual (Type 1)

Name Olivia Jeanne Hamilton

Credential MSW, LCSW

Sex Female

Practice address 135 Gold Star Blvd, Worcester, MA, 01606

Phone (774) 994-6649

Enumeration date Jul 18, 2024

Last updated in NPPES Jun 29, 2026

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License LCSW2140758 (MA) Primary

LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW credential

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 specialty is Olivia Hamilton?

Olivia Hamilton is registered in NPPES with the primary taxonomy of Social Worker. The taxonomy code describes the provider's classification and area of specialization for claims and credentialing.

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-06-29.