Cesar Enrique Siu, O.D.
Optometrist · Union City, CA
Cesar Enrique Siu, O.D. is an optometrist with a practice address in Union City, California, and NPI 1699821967, issued on Jan 26, 2007. Check the license (California 8860T, as entered in NPPES) with the California board that licenses this profession; the federal record below is the public data PlainDoctor holds for this provider.
- Name
- Cesar Enrique Siu
- Credential
- O.D.
- Primary taxonomy
- Optometrist 152W00000X
- License number
- 8860T CA
Self-reported in NPPES; status is on the state search - Practice location
- 33800 Alvarado Niles RD, Union City, CA 94587
- Phone
- (510) 487-5856
- Enumerated
- Jan 26, 2007
- Record last updated
- Jul 8, 2007 (not updated in 19 years: call before relying on the address or phone)
- Fax
- (510) 487-3772
- Medicaid ID
- SD0088600 CA
- Entity
- Type 1 · individual
8 nearest optometrist records → All 8,308 in California → Look up another NPI →
Also registered at 33800 Alvarado Niles RD
A shared address usually means a shared clinic or building; it does not show who employs whom.
- Leon Chang, D.D.S.General Practice Dentistry1982868949
Verify Cesar Enrique Siu in five checks
- 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
- 2LicenseActive license and public ordersWhich California board licenses this profession
Search for license 8860TCheck the board - 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
- 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
- 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Cesar Enrique Siu among 8,308 optometrist records in California
Cesar Enrique Siu, O.D. is one of 8,308 optometrist records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does not. Its NPI, issued in 2007, is newer than 34% of them.
- NPI issued2007 · 34% of these records are older, 46% newer
- In a Medicare fileNo · 67% of these records are
- In the CMS Doctors and Clinicians fileNo · 43% of these records are
- Record last updated2007 · 67% of these records were not updated in five years or more
Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).
25 optometrist records list a practice address in Union City
They are 25 of the 1,006 NPPES records with a practice address in Union City, and 8,308 optometrist records in California. No Medicare prescribing, quality score, industry payment or hospital affiliation is published for this NPI.
All 8,308 in California → Every provider in Union City → Optometrist nationwide →
The 8 optometrist records with the nearest ZIP codes
- Saul Cepeda, ODUnion City, CA 945871073573853
- Connie Choi, O.D.Union City, CA 945871104977693
- Deborah Deveno, ODUnion City, CA 945871871659433
- Trisha Garcia-Herron, O.D.Union City, CA 945871881745529
- Vicki Hughes, O.D.Union City, CA 945871639220585
- Danny Hum, O.D.Union City, CA 945871700930294
- Johnny Jang, O.D.Union City, CA 945871932266798
- Vincent Lee, O.D.Union City, CA 945871659425445
Common questions
What is Cesar Enrique Siu, O.D.'s NPI number?
Cesar Enrique Siu, O.D.'s National Provider Identifier (NPI) is 1699821967, issued on Jan 26, 2007. An NPI identifies a provider in billing; it is not a license.
Where is Cesar Enrique Siu, O.D. located?
The NPPES record lists a practice address at 33800 Alvarado Niles RD, Union City, CA, 94587. Phone: (510) 487-5856. Providers update this record themselves, so call before visiting.
How can I verify Cesar Enrique Siu, O.D.'s license?
NPPES lists California license number 8860T, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.
Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. An NPI identifies who bills; it is not a license.
Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.