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Cesar Siu, O.D.
NPI 1699821967 · Optometrist · Union City, CA
Cesar Siu, O.D. is a Optometrist provider in Union City, CA (NPI 1699821967).
Provider details
- NPI number
- 1699821967
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D.
- Sex
- Male
- Sole proprietor
- Yes
- License
- 8860T (CA)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
Detailed profile(90/100 index)
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
19 yrs in NPPES registry
- Profile completeness38% of score
100% of core fields populated
- Practice footprint23% of score
1 documented practice location
Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our methodology.
Practice location
33800 Alvarado Niles Rd
3
Union City, CA 94587-4359
Phone: (510) 487-5856
Fax: (510) 487-3772
Approximate (ZIP-level) locationGet directions
Mailing address
5923 Remer Ter
Fremont, CA 94555-3631
Registry dates
- Enumerated
- 2007-01-26
- Last updated
- 2007-07-08
Frequently asked questions
- What is Cesar Siu's NPI number?
- Cesar Siu's National Provider Identifier (NPI) is 1699821967, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Cesar Siu's specialty?
- Cesar Siu is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Cesar Siu located?
- Cesar Siu's practice location on file with NPPES is 33800 Alvarado Niles Rd, Union City, CA 94587-4359.
- What is Cesar Siu's phone number?
- The practice phone number listed in the NPPES registry for Cesar Siu is (510) 487-5856.
- Is Cesar Siu's NPI active?
- Yes — Cesar Siu's NPI (1699821967) is active in the NPPES registry as of the last update on 2007-07-08.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.