Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum Sole proprietor

John Joseph Warren, ED.D.

Q: What is the NPI number for John Warren?

The National Provider Identifier (NPI) for John Warren is 1669530945, a Type 1 (individual) record in the CMS NPPES registry.

Psychologist in Needham, MA · enumerated 2006.

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

National Provider Identifier

1669530945

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Registry record

Entity type Individual (Type 1)

Name John Joseph Warren

Credential ED.D.

Sex Male

Practice address Needham, MA, 02494

Phone (617) 620-9711

Enumeration date Dec 5, 2006

Last updated in NPPES Jul 8, 2007

Street address withheld — NPPES sole-proprietor addresses can be home addresses. See our data policy.

Taxonomy & licenses

103T00000X Psychologist Behavioral Health & Social Service Providers · License 2604 (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

Where does John Warren practice?

The practice location on file with NPPES is in Needham, MA. Providers can have multiple locations; NPPES lists the primary practice address.

What is the NPI number for John Warren?

The National Provider Identifier (NPI) for John Warren is 1669530945, a Type 1 (individual) record in the CMS NPPES registry.

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