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Dr. Ivy Karen Sun, OD

Optometrist in San Ramon, CA · enumerated 2005.

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

National Provider Identifier

1154312916

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Registry record

Entity type Individual (Type 1)
Name Dr. Ivy Karen Sun
Credential OD
Sex Female
Practice address 175 Market Pl, San Ramon, CA, 94583
Phone (925) 275-0202
Fax (925) 275-0447
Enumeration date Nov 2, 2005
Last updated in NPPES Jan 3, 2022

Taxonomy & licenses

152W00000X Optometrist Eye and Vision Services Providers · License 10943T (CA) Primary
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.

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Frequently asked questions

How do I verify Ivy Sun's NPI record?
Cross-check NPI 1154312916 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Is NPI 1154312916 active?
Yes, as of the latest NPPES snapshot, NPI 1154312916 is active (record last updated 2022-01-03).

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Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-01-03.