Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Dr. Jeffrey Warren Summerville, PSY.D., LCSW

Clinical Social Worker in Hamden, CT · enumerated 2006.

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

National Provider Identifier

1013926708

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Registry record

Entity type Individual (Type 1)

Name Dr. Jeffrey Warren Summerville

Credential PSY.D., LCSW

Sex Male

Practice address 295 Washington Avenue, Suite 9, Hamden, CT, 06518

Phone (203) 287-8227

Fax (203) 287-9502

Enumeration date Aug 5, 2006

Last updated in NPPES Feb 14, 2012

Taxonomy & licenses

1041C0700X Clinical Social Worker Behavioral Health & Social Service Providers · License 000823 (CT) Primary

PSYD · Doctor of Psychology: A clinical doctorate in psychology focused on professional practice. About the PSYD credential

Other identifiers

Identifier	Type	State	Issuer
140000823CT01	Other	-	ANTHEM BCBS

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

What is the NPI number for Jeffrey Summerville?

The National Provider Identifier (NPI) for Jeffrey Summerville is 1013926708, a Type 1 (individual) record in the CMS NPPES registry.

Where does Jeffrey Summerville practice?

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

Other providers at this practice address

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Robert Koenig Clinical Psychologist · Hamden, CT NPI 1528078441

Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2012-02-14.