Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mrs. Rosaria Kozar, MSW

Clinical Social Worker in Lancaster, MA · enumerated 2025.

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

National Provider Identifier

1801752282

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Registry record

Entity type Individual (Type 1)

Name Mrs. Rosaria Kozar

Credential MSW

Sex Female

Practice address 971 Main St, Lancaster, MA, 01523

Phone (978) 368-6461

Enumeration date Dec 30, 2025

Last updated in NPPES Dec 30, 2025

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License LCSW228882 (MA) 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.

Read the full guide → Validate an NPI →

Frequently asked questions

What is the NPI number for Rosaria Kozar?

The National Provider Identifier (NPI) for Rosaria Kozar is 1801752282, a Type 1 (individual) record in the CMS NPPES registry.

Where does Rosaria Kozar practice?

The practice location on file with NPPES is in Lancaster, MA. 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 2025-12-30.