Type 2 · Organization ✓ Active NPI ✓ Valid NPI checksum

John F. O'Brien, M.D., P.C.

Internal Medicine Physician in Newton Lower Falls, MA · enumerated 2007 · authorized official John Obrien, Owner.

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

National Provider Identifier

1548314644

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Registry record

Entity type Organization (Type 2)

Legal business name John F. O'Brien, M.D., P.C.

Practice address 2000 Washington St, Suite 662, Newton Lower Falls, MA, 02462

Phone (617) 964-9050

Fax (617) 928-0913

Enumeration date Jan 23, 2007

Last updated in NPPES Oct 15, 2020

Taxonomy & classification

207R00000X Internal Medicine Physician Allopathic & Osteopathic Physicians · License 37318 (MA) Primary

Authorized official

Name John Obrien

Title Owner

Phone (617) 964-9050

Other identifiers

Identifier	Type	State	Issuer
M17678	Other	MA	GROUP BS NUMBER

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

Where is John F. O'Brien, M.D., P.C. located?

The practice location on file with NPPES is in Newton Lower Falls, MA.

How current is this record?

Data comes from the CMS NPPES public dissemination file; this record was last updated in NPPES on 2020-10-15. Verify at npiregistry.cms.hhs.gov.

Providers at this address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2020-10-15.