Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

The Add Center of Western Massachusetts

Clinical Neuropsychologist in Springfield, MA · enumerated 2006 · authorized official Mitchell Clionsky, President Director.

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

National Provider Identifier

1619042496

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Registry record

Entity type Organization (Type 2)

Legal business name The Add Center of Western Massachusetts

Practice address 155 Maple Street, Suite 203, Springfield, MA, 01105

Phone (413) 734-2800

Fax (413) 739-1652

Enumeration date Nov 21, 2006

Last updated in NPPES Sep 11, 2025

Taxonomy & classification

103G00000X Clinical Neuropsychologist Behavioral Health & Social Service Providers Primary

103T00000X Psychologist Behavioral Health & Social Service Providers Secondary

Authorized official

Name Mitchell Clionsky

Title President Director

Phone (413) 734-2800

Other identifiers

Identifier	Type	State	Issuer
W10372	Other	-	BCBS OF MA

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 a Type 2 NPI?

A Type 2 NPI identifies an organization (group practice, hospital, pharmacy, lab), while Type 1 NPIs identify individual providers. Organizations bill under their Type 2 NPI.

What type of organization is The Add Center of Western Massachusetts?

The Add Center of Western Massachusetts is registered in NPPES as a Clinical Neuropsychologist (its primary provider taxonomy).

Providers at this address

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Elizabeth Wexford Clinical Psychologist · Springfield, MA NPI 1518032382 Mitchell Clionsky Clinical Neuropsychologist · Springfield, MA NPI 1083772537

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