Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Renee Castellan

Social Worker in Naugatuck, CT · enumerated 2021.

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

National Provider Identifier

1194489559

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Registry record

Entity type Individual (Type 1)

Name Renee Castellan

Sex Female

Practice address 333 Church St, Naugatuck, CT, 06770

Phone (203) 723-9599

Enumeration date Oct 22, 2021

Last updated in NPPES May 18, 2026

Taxonomy & licenses

104100000X Social Worker Behavioral Health & Social Service Providers · License 16490 (CT) 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

Is NPI 1194489559 active?

Yes, as of the latest NPPES snapshot, NPI 1194489559 is active (record last updated 2026-05-18).

How do I verify Renee Castellan's NPI record?

Cross-check NPI 1194489559 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2026-05-18.