Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum

Jeffrey W Duncan, D.P.T.

Physical Therapist in Pleasanton, CA · enumerated 2006.

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

National Provider Identifier

1396838165

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Registry record

Entity type Individual (Type 1)

Name Jeffrey W Duncan

Credential D.P.T.

Sex Male

Practice address 4626 Willow Rd, Suite 200, Pleasanton, CA, 94588

Phone (925) 463-0470

Fax (925) 463-0473

Enumeration date Oct 2, 2006

Last updated in NPPES Mar 6, 2014

Taxonomy & licenses

225100000X Physical Therapist Respiratory, Developmental, Rehabilitative and Restorative Service Providers · License PT 26589 (CA) Primary

DPT · Doctor of Physical Therapy: A physical therapist holding the clinical doctorate now standard for the profession. About the DPT credential

Other identifiers

Identifier	Type	State	Issuer
P00973104	Other	CA	MEDICARE RAILROAD

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 Jeffrey Duncan practice?

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

What is the NPI number for Jeffrey Duncan?

The National Provider Identifier (NPI) for Jeffrey Duncan is 1396838165, a Type 1 (individual) record in the CMS NPPES registry.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2014-03-06.