Sidney Nguyen, OD
NPI 1285500769 · Optometrist · Livermore, CA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Sidney Nguyen, OD is a Optometrist provider in Livermore, CA (NPI 1285500769).
Provider details
- NPI number
- 1285500769
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Female
- Sole proprietor
- No
- License
- 36135 (CA)
Specialties & taxonomies
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure38% of score
Under 1 yr in 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
Mailing address
Registry dates
- Enumerated
- 2025-10-13
- Last updated
- 2025-10-13
- Certified
- 2025-10-13
Frequently asked questions
- What is Sidney Nguyen's NPI number?
- Sidney Nguyen's National Provider Identifier (NPI) is 1285500769, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Sidney Nguyen's specialty?
- Sidney Nguyen is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Sidney Nguyen located?
- Sidney Nguyen's practice location on file with NPPES is 2580 Old 1st St, Livermore, CA 94550-2055.
- What is Sidney Nguyen's phone number?
- The practice phone number listed in the NPPES registry for Sidney Nguyen is (925) 449-8188.
- Does Sidney Nguyen accept Medicare?
- Sidney Nguyen is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Sidney Nguyen's NPI active?
- Yes — Sidney Nguyen's NPI (1285500769) is active in the NPPES registry as of the last update on 2025-10-13.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.