Type 1 · Individual ✓ Active NPI ✓ Valid NPI checksum
Carmen Yu
Optometrist in Antioch, CA · enumerated 2019.
Data current as of Jul 13, 2026 · sourced from CMS NPPES
National Provider Identifier
1619433745
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Registry record
Entity type Individual (Type 1)
Name Carmen Yu
Sex Female
Practice address 4893 Lone Tree Way, Antioch, CA, 94531
Phone (925) 978-0615
Enumeration date Feb 13, 2019
Last updated in NPPES Feb 3, 2022
Taxonomy & licenses
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
Is NPI 1619433745 active?
Yes, as of the latest NPPES snapshot, NPI 1619433745 is active (record last updated 2022-02-03).
How do I verify Carmen Yu's NPI record?
Cross-check NPI 1619433745 against the official CMS registry at npiregistry.cms.hhs.gov. This page mirrors the same public NPPES data with a monthly snapshot.
Other providers at this practice address
Browse all → National Vision, Inc. Eyewear Supplier · Antioch, CA NPI 1801841622 Walmart Inc. Community/Retail Pharmacy · Antioch, CA NPI 1689691909 Khanh Hoang Optometrist · Antioch, CA NPI 1730207168 Firstsight Vision Services, Inc. Optometrist · Antioch, CA NPI 1477733764 Somaia Nassef Optometrist · Antioch, CA NPI 1578016457 Jenny Bui Pharmacist · Antioch, CA NPI 1235601402 Walmart, Inc. Optician · Antioch, CA NPI 1295502292 Priya Kaura, Od, Inc. Optometrist · Antioch, CA NPI 1689435596
Source: CMS NPPES (public data). Snapshot 2026-07-13. Provider record last updated 2022-02-03.