Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Mass General Brigham Medical Group Western Massachusetts Inc

Family Medicine Physician in Northampton, MA · enumerated 2006 · authorized official Lindsay Gainer, President & Coo.

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

National Provider Identifier

1295787919

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Registry record

Entity type Organization (Type 2)

Legal business name Mass General Brigham Medical Group Western Massachusetts Inc

Other name <Unavail>

Practice address 30 Locust St, Northampton, MA, 01060

Phone (413) 582-2898

Fax (413) 582-2958

Enumeration date May 17, 2006

Last updated in NPPES Jun 2, 2025

Taxonomy & classification

207LH0002X Hospice and Palliative Medicine (Anesthesiology) Physician Allopathic & Osteopathic Physicians Secondary

207Q00000X Family Medicine Physician Allopathic & Osteopathic Physicians Primary

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians Secondary

207RC0200X Critical Care Medicine (Internal Medicine) Physician Allopathic & Osteopathic Physicians Secondary

207RH0003X Hematology & Oncology Physician Allopathic & Osteopathic Physicians Secondary

207RI0200X Infectious Disease Physician Allopathic & Osteopathic Physicians Secondary

207V00000X Obstetrics & Gynecology Physician Allopathic & Osteopathic Physicians Secondary

208000000X Pediatrics Physician Allopathic & Osteopathic Physicians Secondary

208100000X Physical Medicine & Rehabilitation Physician Allopathic & Osteopathic Physicians Secondary

208200000X Plastic Surgery Physician Allopathic & Osteopathic Physicians Secondary

2084P0800X Psychiatry Physician Allopathic & Osteopathic Physicians Secondary

2085R0204X Vascular & Interventional Radiology Physician Allopathic & Osteopathic Physicians Secondary

208600000X Surgery Physician Allopathic & Osteopathic Physicians Secondary

213E00000X Podiatrist Podiatric Medicine & Surgery Service Providers Secondary

332B00000X Durable Medical Equipment & Medical Supplies Suppliers Secondary

Authorized official

Name Lindsay Gainer

Title President & Coo

Phone (857) 282-3914

Other identifiers

Identifier	Type	State	Issuer
CJ0816	Other	MA	MEDICARE RAILROAD
M15904	Other	MA	BLUE CROSS BLUE SHIELD OF MASSACHUSETTS
614074	Other	MA	TUFTS HEALTH PLAN
9774653	Medicaid	MA	-
617074	Other	MA	TUFTS HEALTH PLAN
M15904	Other	MA	BCBS OF MASS

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 type of organization is Mass General Brigham Medical Group Western Massachusetts Inc?

Mass General Brigham Medical Group Western Massachusetts Inc is registered in NPPES as a Family Medicine Physician (its primary provider taxonomy).

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.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2025-06-02.