Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Leslie S Swiderski, RN,LCSW

Registered Nurse in Waterbury, CT · enumerated 2006.

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

National Provider Identifier

1952373136

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Registry record

Entity type Individual (Type 1)

Name Mr. Leslie S Swiderski

Credential RN,LCSW

Sex Female

Practice address 64 Robbins St, Waterbury, CT, 06708

Phone (203) 573-6500

Fax (203) 573-7007

Enumeration date Feb 2, 2006

Last updated in NPPES Sep 11, 2025

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 005715 (CT) Secondary

163W00000X Registered Nurse Nursing Service Providers · License E36457 (CT) Primary

RN · Registered Nurse: A nurse who completed an accredited nursing program and passed the NCLEX-RN licensure exam. About the RN 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

How do I verify Leslie Swiderski's NPI record?

Cross-check NPI 1952373136 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Is NPI 1952373136 active?

Yes, as of the latest NPPES snapshot, NPI 1952373136 is active (record last updated 2025-09-11).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-09-11.