NPI Portal NPI Lookup & Verification

Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

Mrs. Ruth P Lallier, LCSW

Social Worker in Winsted, CT · enumerated 2006.

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

National Provider Identifier

1245396282

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Registry record

Entity type Individual (Type 1)
Name Mrs. Ruth P Lallier
Credential LCSW
Sex Female
Practice address Winsted, CT, 06098
Phone (860) 379-6015
Fax (860) 379-6016
Enumeration date Dec 27, 2006
Last updated in NPPES Jun 3, 2010

Street address withheld: NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 003085 (CT) Primary
LCSW · Licensed Clinical Social Worker: A social worker licensed for clinical practice including mental-health therapy. About the LCSW credential

Other identifiers

Identifier Type State Issuer
140003085CT02 Other CT BCBS
186568 Other CT MHN

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 Ruth Lallier?
The National Provider Identifier (NPI) for Ruth Lallier is 1245396282, a Type 1 (individual) record in the CMS NPPES registry.
Where does Ruth Lallier practice?
The practice location on file with NPPES is in Winsted, CT. Providers can have multiple locations; NPPES lists the primary practice address.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-06-03.