Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.

John Sic-Yiu Liu

Individual provider Optometrist · NPI 1114949419

John Sic-Yiu Liu is an Optometrist in Castro Valley, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2006

Practice location Address checks out

3550 Castro Valley Blvd
Castro Valley, CA 94546-4402
Phone: (510) 581-1680
Fax: (510) 581-5070
Show map & directions

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Optometrist (primary) Taxonomy 152W00000X · Licence 6498T (CA)

Record details

NPI number1114949419
Entity typeIndividual (Type 1)
GenderMale
Sole proprietorYes
NPI enumeratedJuly 24, 2006
Last updated in NPPESJune 16, 2009

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