What is John Liu's NPI number?

John Liu's National Provider Identifier (NPI) is 1114949419, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.

What is John Liu's specialty?

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

Where is John Liu located?

John Liu's practice location on file with NPPES is 3550 Castro Valley Blvd, Castro Valley, CA 94546-4402.

What is John Liu's phone number?

The practice phone number listed in the NPPES registry for John Liu is (510) 581-1680.

Is John Liu's NPI active?

Yes — John Liu's NPI (1114949419) is active in the NPPES registry as of the last update on 2009-06-16.

IndividualActive

John Liu

NPI 1114949419 · Optometrist · Castro Valley, CA

John Liu is a Optometrist provider in Castro Valley, CA (NPI 1114949419).

Provider details

NPI number: 1114949419
Entity type: Individual
Primary specialty: OptometristEye and Vision Services Providers
Sex: Male
Sole proprietor: Yes
License: 6498T (CA)

Specialties & taxonomies

OptometristPrimary152W00000XLicense 6498T (CA)
Eye and Vision Services Providers

Profile Score

Detailed profile(91/100 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

3550 Castro Valley Blvd

Castro Valley, CA 94546-4402

Phone: (510) 581-1680

Fax: (510) 581-5070

Street-level locationGet directions

More CA providers

Mailing address