What is Barbara Chan's NPI number?

Barbara Chan's National Provider Identifier (NPI) is 1699826461, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is Barbara Chan's specialty?

Barbara Chan is listed in the NPPES registry with a primary specialty of Optometrist (Eye and Vision Services Providers).

Where is Barbara Chan located?

Barbara Chan's practice location on file with NPPES is 3553 Whipple Rd, Union City, CA 94587-1507.

What is Barbara Chan's phone number?

The practice phone number listed in the NPPES registry for Barbara Chan is (510) 675-4449.

Is Barbara Chan's NPI active?

Yes — Barbara Chan's NPI (1699826461) is active in the NPPES registry as of the last update on 2026-05-31.

IndividualActive

Barbara Chan, O.D.

NPI 1699826461 · Optometrist · Union City, CA

Barbara Chan, O.D. is a Optometrist provider in Union City, CA (NPI 1699826461).

Provider details

NPI number: 1699826461
Entity type: Individual
Primary specialty: OptometristEye and Vision Services Providers
Credential: O.D.
Sex: Female
Sole proprietor: No
License: 8445 (CA)

Specialties & taxonomies

OptometristPrimary152W00000XLicense 8445 (CA)
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

3553 Whipple Rd

Building B

Union City, CA 94587-1507

Phone: (510) 675-4449

Fax: (520) 675-4782

Street-level locationGet directions

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Mailing address