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

Dr. Gary Allan Osias, OD

Individual provider Optometrist · NPI 1639230923

Dr. Gary Allan Osias, OD is an Optometrist in Castro Valley, California. Practices as a sole proprietor. Licensed in California.

Licensed in
CA
In the registry since
2006
What do these letters mean?
OD — Doctor of Optometry
An optometrist: examines eyes, prescribes glasses and contacts, and treats many eye conditions.

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Practice location Address checks out

2687 Castro Valley Blvd
Castro Valley, CA 94546-5409
Phone: (510) 581-1553
Fax: (510) 581-1929
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Optometrist (primary) Taxonomy 152W00000X · Licence 07027T (CA)

Record details

NPI number1639230923
Entity typeIndividual (Type 1)
GenderMale
Credentials OD
Sole proprietorYes
NPI enumeratedDecember 12, 2006
Last updated in NPPESJune 3, 2015

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