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

Mr. Jay Robert Warren, LICSW

Clinical Social Worker in Cambridge, MA · enumerated 2006.

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

National Provider Identifier

1609891951

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Registry record

Entity type Individual (Type 1)
Name Mr. Jay Robert Warren
Credential LICSW
Sex Male
Practice address Cambridge, MA, 02139
Phone (617) 283-6336
Enumeration date Jul 13, 2006
Last updated in NPPES May 1, 2017

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

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 105336 (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.

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Frequently asked questions

Where does Jay Warren practice?
The practice location on file with NPPES is in Cambridge, MA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Jay Warren?
The National Provider Identifier (NPI) for Jay Warren is 1609891951, a Type 1 (individual) record in the CMS NPPES registry.

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2017-05-01.