Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

Commonwealth of Massachusetts

Q: What is the NPI number for Commonwealth of Massachusetts?

The NPI for Commonwealth of Massachusetts is 1104943885, a Type 2 (organization) record in the CMS NPPES registry.

Case Management Agency in Boston, MA · enumerated 2007 · authorized official Ros Simon, Site Director.

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

National Provider Identifier

1104943885

Verified

See something wrong? Report a correction

Registry record

Entity type Organization (Type 2)

Legal business name Commonwealth of Massachusetts

Other name <Unavail>

Practice address 25 Staniford St, Boston, MA, 02114

Phone (617) 626-8501

Fax (617) 626-8515

Enumeration date Mar 26, 2007

Last updated in NPPES Aug 22, 2020

Taxonomy & classification

251B00000X Case Management Agency Agencies Primary

Authorized official

Name Ros Simon

Title Site Director

Phone (617) 626-8501

Other identifiers

Identifier	Type	State	Issuer
1802224	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

Who is the authorized official for Commonwealth of Massachusetts?

NPPES lists Ros Simon (Site Director) as the authorized official for this organization.

What is the NPI number for Commonwealth of Massachusetts?

The NPI for Commonwealth of Massachusetts is 1104943885, a Type 2 (organization) record in the CMS NPPES registry.

Providers at this address

Browse all →

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