Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Sarah O'Brien, LCSW

Clinical Social Worker in Woodbury, CT · enumerated 2021 · practices at Sarah O'Brien Lcsw LLC.

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

National Provider Identifier

1245823426

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Registry record

Entity type Individual (Type 1)

Name Sarah O'Brien

Credential LCSW

Sex Female

Practice address 787 Main St S, Woodbury, CT, 06798

Phone (203) 231-2443

Enumeration date Feb 18, 2021

Last updated in NPPES Feb 24, 2025

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 13121 (CT) 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 is the NPI number for Sarah O'Brien?

The National Provider Identifier (NPI) for Sarah O'Brien is 1245823426, a Type 1 (individual) record in the CMS NPPES registry.

Where does Sarah O'Brien practice?

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

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Sarah O'Brien Lcsw LLC Clinical Social Worker · Woodbury, CT NPI 1558167916

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-02-24.