Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum Organization subpart

Mass General Waltham

Q: What type of organization is Mass General Waltham?

Mass General Waltham is registered in NPPES as a Health Service Clinic/Center (its primary provider taxonomy).

Health Service Clinic/Center in Waltham, MA · enumerated 2006 · authorized official Sally Boemer, Evp of Administration & Finance.

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

National Provider Identifier

1710070313

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Registry record

Entity type Organization (Type 2)

Legal business name Mass General Waltham

Other name <Unavail>

Parent organization The General Hospital Corporation

Practice address 52 Second Ave Fl 4, Waltham, MA, 02451

Phone (781) 487-4390

Fax (781) 487-4391

Enumeration date Oct 2, 2006

Last updated in NPPES Aug 31, 2022

Taxonomy & classification

261QH0100X Health Service Clinic/Center Ambulatory Health Care Facilities · License MA0049076 (MA) Primary

Authorized official

Name Sally Boemer

Title Evp of Administration & Finance

Phone (617) 724-4537

Other identifiers

Identifier	Type	State	Issuer
0447641	Medicaid	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 type of organization is Mass General Waltham?

Mass General Waltham is registered in NPPES as a Health Service Clinic/Center (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.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-08-31.