Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Dr. Cheslyn Mei Gan, O.D.
Optometrist in Walnut Creek, CA · enumerated 2005.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1417951120
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Registry record
Entity type Individual (Type 1)
Name Dr. Cheslyn Mei Gan
Credential O.D.
Sex Female
Practice address 1553 Palos Verdes Mall, Walnut Creek, CA, 94597
Phone (925) 934-9328
Fax (925) 934-9383
Enumeration date Jun 9, 2005
Last updated in NPPES Aug 25, 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
What is the NPI number for Cheslyn Gan?
The National Provider Identifier (NPI) for Cheslyn Gan is 1417951120, a Type 1 (individual) record in the CMS NPPES registry.
Where does Cheslyn Gan practice?
The practice location on file with NPPES is in Walnut Creek, CA. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all → Linda Cushing Optometrist · Walnut Creek, CA NPI 1790785780 Linda Anne Cushing Od & Cheslyn Mei Gan Od Optometrist · Walnut Creek, CA NPI 1558568568 Cheslyn Gan Optometrist Inc Optometrist · Walnut Creek, CA NPI 1144891714 Stephanie Veilleux Od & Winson Ong Od Optometrist · Walnut Creek, CA NPI 1699475996
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2021-08-25.