Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Sylvia Phung, OD
Optometrist in Fontana, CA · enumerated 2021.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1194398453
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Registry record
Entity type Individual (Type 1)
Name Sylvia Phung
Credential OD
Sex Female
Practice address 16803 Valley Blvd Unit A, Fontana, CA, 92335
Phone (909) 349-0299
Enumeration date Jul 22, 2021
Last updated in NPPES Jul 22, 2021
Taxonomy & licenses
OD · Doctor of Optometry: A licensed optometrist providing primary vision care, eye exams, and corrective lenses.
About the OD 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.
Frequently asked questions
Where does Sylvia Phung practice?
The practice location on file with NPPES is in Fontana, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for Sylvia Phung?
The National Provider Identifier (NPI) for Sylvia Phung is 1194398453, a Type 1 (individual) record in the CMS NPPES registry.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-07-22.