Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Radiation Oncology Group of Western Ma, LLC

Q: What is the NPI number for Radiation Oncology Group of Western Ma, LLC?

The NPI for Radiation Oncology Group of Western Ma, LLC is 1376588285, a Type 2 (organization) record in the CMS NPPES registry.

Radiation Oncology Physician in Northampton, MA · enumerated 2006 · authorized official Robert Stein, President.

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

National Provider Identifier

1376588285

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Registry record

Entity type Organization (Type 2)

Legal business name Radiation Oncology Group of Western Ma, LLC

Practice address 30 Locust St, Northampton, MA, 01060

Phone (413) 582-2963

Enumeration date Jun 17, 2006

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

2085R0001X Radiation Oncology Physician Allopathic & Osteopathic Physicians Primary

Authorized official

Name Robert Stein

Title President

Phone (413) 582-2963

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

Who is the authorized official for Radiation Oncology Group of Western Ma, LLC?

NPPES lists Robert Stein (President) as the authorized official for this organization.

What is the NPI number for Radiation Oncology Group of Western Ma, LLC?

The NPI for Radiation Oncology Group of Western Ma, LLC is 1376588285, a Type 2 (organization) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-08-22.