Tina Chang, O.D., M.S.
NPI 1427212497 · Optometrist · Fremont, CA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Tina Chang, O.D., M.S. is a Optometrist provider in Fremont, CA (NPI 1427212497).
Provider details
- NPI number
- 1427212497
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- O.D., M.S.
- Sex
- Female
- Sole proprietor
- Yes
- License
- TUV007274 (NY)
Specialties & taxonomies
Eye and Vision Services Providers
Eye and Vision Services Providers
Eye and Vision Services Providers
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure33% of score
17 yrs in NPPES registry
- Profile completeness33% of score
100% of core fields populated
- Practice footprint20% of score
1 documented practice location
- Open Payments transparency13% of score
Has Open Payments disclosures (2024)
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.
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$97 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-07-17
- Last updated
- 2009-09-22
Frequently asked questions
- What is Tina Chang's NPI number?
- Tina Chang's National Provider Identifier (NPI) is 1427212497, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Tina Chang's specialty?
- Tina Chang is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Tina Chang located?
- Tina Chang's practice location on file with NPPES is 596 Boar Cir, Fremont, CA 94539-6042.
- What is Tina Chang's phone number?
- The practice phone number listed in the NPPES registry for Tina Chang is (510) 579-6365.
- Does Tina Chang accept Medicare?
- Tina Chang is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Tina Chang's NPI active?
- Yes — Tina Chang's NPI (1427212497) is active in the NPPES registry as of the last update on 2009-09-22.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.