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Dr. Lieu That Ton, OD

Optometrist in Walnut, CA · enumerated 2005 · practices at Family Optometry of Walnut, Inc..

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

National Provider Identifier

1023009693

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Registry record

Entity type Individual (Type 1)
Name Dr. Lieu That Ton
Credential OD
Sex Male
Practice address 358 N Lemon Ave, Walnut, CA, 91789
Phone (909) 869-9448
Fax (909) 869-9354
Enumeration date Nov 2, 2005
Last updated in NPPES Jun 12, 2008

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 10557TPL (CA) Primary
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses. About the OD credential

Other identifiers

Identifier Type State Issuer
S00105570 Medicaid CA -

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 Lieu Ton practice?
The practice location on file with NPPES is in Walnut, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Lieu Ton?
The National Provider Identifier (NPI) for Lieu Ton is 1023009693, 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 2008-06-12.