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

Dr. Diane Phan, DDS

General Practice Dentistry in Fontana, CA · enumerated 2007 · practices at Tran & Phan, A Professional Dental Coporation.

Data current as of Jul 11, 2026 · sourced from CMS NPPES

National Provider Identifier

1902923642

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Registry record

Entity type Individual (Type 1)
Name Dr. Diane Phan
Credential DDS
Sex Female
Practice address Fontana, CA, 92335
Phone (909) 434-0865
Enumeration date Mar 26, 2007
Last updated in NPPES Jun 9, 2015

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

Taxonomy & licenses

1223G0001X General Practice Dentistry Dental Providers · License 47410 (CA) Primary
DDS — Doctor of Dental Surgery: A licensed dentist; DDS and DMD are equivalent dental degrees. About the DDS credential

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

What is the NPI number for Diane Phan?
The National Provider Identifier (NPI) for Diane Phan is 1902923642, a Type 1 (individual) record in the CMS NPPES registry.
Where does Diane Phan practice?
The practice location on file with NPPES is in Fontana, CA. Providers can have multiple locations; NPPES lists the primary practice address.

Other providers at this practice address

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Source: CMS NPPES (public data). Snapshot 2026-07-11. Provider record last updated 2015-06-09.