Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Atrium Dental Group, Inc.

General Practice Dentistry in East Longmeadow, MA · enumerated 2010 · authorized official Tomasz Chrzan, Dentist/Owner.

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

National Provider Identifier

1942502620

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Registry record

Entity type Organization (Type 2)

Legal business name Atrium Dental Group, Inc.

Practice address 100 Shaker Rd, East Longmeadow, MA, 01028

Phone (413) 525-3000

Enumeration date Dec 1, 2010

Last updated in NPPES Dec 1, 2010

Taxonomy & classification

1223G0001X General Practice Dentistry Dental Providers · License 21508 (MA) Primary

Authorized official

Name Tomasz Chrzan

Title Dentist/Owner

Phone (413) 525-3000

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

Where is Atrium Dental Group, Inc. located?

The practice location on file with NPPES is in East Longmeadow, MA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2010-12-01. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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Tomasz Chrzan General Practice Dentistry · East Longmeadow, MA NPI 1164649984

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-12-01.