Vivien Chan, OD
NPI 1679685911 · Optometrist · Pasadena, CA
Enrolled with Medicare as Practitioner - Optometry · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Vivien Chan, OD is a Optometrist provider in Pasadena, CA (NPI 1679685911).
Provider details
- NPI number
- 1679685911
- Entity type
- Individual
- Primary specialty
- OptometristEye and Vision Services Providers
- Credential
- OD
- Sex
- Female
- Sole proprietor
- No
- License
- 7158T (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 tenure33% of score
19 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.
$2,237 across 41 records (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
- 2006-08-31
- Last updated
- 2019-06-25
Frequently asked questions
- What is Vivien Chan's NPI number?
- Vivien Chan's National Provider Identifier (NPI) is 1679685911, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is Vivien Chan's specialty?
- Vivien Chan is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).
- Where is Vivien Chan located?
- Vivien Chan's practice location on file with NPPES is 477 E Colorado Blvd, Pasadena, CA 91101-2024.
- What is Vivien Chan's phone number?
- The practice phone number listed in the NPPES registry for Vivien Chan is (626) 796-1191.
- Does Vivien Chan accept Medicare?
- Vivien Chan is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is Vivien Chan's NPI active?
- Yes — Vivien Chan's NPI (1679685911) is active in the NPPES registry as of the last update on 2019-06-25.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.