Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Gail Chlastawa

Behavior Analyst in Westfield, MA · enumerated 2015.

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

National Provider Identifier

1437531787

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Registry record

Entity type Individual (Type 1)

Name Gail Chlastawa

Sex Female

Practice address 209 Root Rd, Westfield, MA, 01085

Phone (413) 568-3942

Fax (413) 568-5983

Enumeration date Jun 23, 2015

Last updated in NPPES Jun 23, 2015

Taxonomy & licenses

103K00000X Behavior Analyst Behavioral Health & Social Service Providers 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.

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Frequently asked questions

Is NPI 1437531787 active?

Yes, as of the latest NPPES snapshot, NPI 1437531787 is active (record last updated 2015-06-23).

How do I verify Gail Chlastawa's NPI record?

Cross-check NPI 1437531787 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2015-06-23.