Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Ellen J Chang, O.D.
Optometrist in Yonkers, NY · enumerated 2008.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1699925420
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Registry record
Entity type Individual (Type 1)
Name Ellen J Chang
Credential O.D.
Sex Female
Practice address 5570 Xavier Dr, Yonkers, NY, 10704
Phone (914) 962-6600
Enumeration date Sep 29, 2008
Last updated in NPPES May 7, 2010
Taxonomy & licenses
152WL0500X Low Vision Rehabilitation Optometrist Eye and Vision Services Providers · License T13619 (CA) Secondary
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 Ellen Chang?
The National Provider Identifier (NPI) for Ellen Chang is 1699925420, a Type 1 (individual) record in the CMS NPPES registry.
Where does Ellen Chang practice?
The practice location on file with NPPES is in Yonkers, NY. Providers can have multiple locations; NPPES lists the primary practice address.
Other providers at this practice address
Browse all →Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2010-05-07.