Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
James Van Phung, OD.
Optometrist in San Marcos, CA · enumerated 2007.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1225181951
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Registry record
Entity type Individual (Type 1)
Name James Van Phung
Credential OD.
Sex Male
Practice address 732 Center Dr., San Marcos, CA, 92069
Phone (760) 839-5161
Fax (760) 741-7160
Enumeration date Jan 18, 2007
Last updated in NPPES Dec 4, 2019
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 James Phung practice?
The practice location on file with NPPES is in San Marcos, CA. Providers can have multiple locations; NPPES lists the primary practice address.
What is the NPI number for James Phung?
The National Provider Identifier (NPI) for James Phung is 1225181951, 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 2019-12-04.