Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Mr. Thomas Francis Obrien, MA MSW LICSW

Psychologist in Brewster, MA · enumerated 2006.

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

National Provider Identifier

1104936889

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Registry record

Entity type Individual (Type 1)

Name Mr. Thomas Francis Obrien

Credential MA MSW LICSW

Sex Male

Practice address 2325 Bay State Court, Brewster, MA, 02631

Phone (508) 240-7964

Fax (508) 240-5448

Enumeration date Aug 30, 2006

Last updated in NPPES Jul 8, 2007

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 110676 (MA) Primary

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

Is NPI 1104936889 active?

Yes, as of the latest NPPES snapshot, NPI 1104936889 is active (record last updated 2007-07-08).

How do I verify Thomas Obrien's NPI record?

Cross-check NPI 1104936889 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2007-07-08.