1. Home
  2. Directory
  3. California
  4. Castro Valley
  5. Optometrist
  6. NPI Profile

DR. GARY ALLAN OSIAS O.D.
NPI 1639230923
Optometrist in Castro Valley, CA

Active since December 12, 2006
2687 CASTRO VALLEY BLVD, CASTRO VALLEY, CA 94546(510) 581-1553(510) 581-1929 Get Directions Write a Review

NPPES record last updated: June 3, 2015. Verified against the NPPES registry weekly; last sync: October 04, 2026.

About Dr. Gary Allan Osias O.d. NPPES

Official registry information on file with the National Plan and Provider Enumeration System.

DR. GARY ALLAN OSIAS O.D. (NPI 1639230923) is an individual optometrist in Castro Valley, California, licensed in California (07027T) and active in the NPI registry since December 2006.

NPPES Registry Identity

NPI1639230923
Entity TypeIndividualMale
Primary Taxonomy152W00000X
Provider Legal NameDR. GARY ALLAN OSIASCredential: O.D.
Location Address2687 CASTRO VALLEY BLVDCastro Valley, CA 94546-5409
Mailing Address2687 Castro Valley BlvdCastro Valley, CA 94546-5409 · (510) 581-1553 · Fax (510) 581-1929
Phone(510) 581-1553
Fax(510) 581-1929
Sole ProprietorYes
Enumeration DateDecember 12, 2006
Last NPPES UpdateJune 3, 2015
✔ NPI 1639230923 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometristEye and Vision Services Providers
Taxonomy Code152W00000X
License✔ Licensed in CA · 07027T
Definition
Doctors of optometry (ODs) are the primary health care professionals for the eye. Optometrists examine, diagnose, treat, and manage diseases, injuries, and disorders of the visual system, the eye, and associated structures as well as identify related systemic conditions affecting the eye. An optometrist has completed pre-professional undergraduate education in a college or university and four years of professional education at a college of optometry, leading to the doctor of optometry (O.D.) degree. Some optometrists complete an optional residency in a specific area of practice. Optometrists are eye health care professionals state-licensed to diagnose and treat diseases and disorders of the eye and visual system.
2687 CASTRO VALLEY BLVD, Castro Valley, CA 94546
Open in Google Maps ↗

Other Identifiers 4

Medicare NSC0199780001CA
MedicaidGSD000960CA
Medicare UPINU25171CA
Medicare PINCA119849CA

Other Providers at the Same Location NPPES 4

Providers registered at the same practice address, or within the immediate area, according to the NPPES registry.

MARC DEA OD
Optometrist
2687 CASTRO VALLEY BLVD
CASTRO VALLEY, CA 94546
Alameda County (510) 581-1553
THROUGH THE HAYES OPTOMETRY INC
Optometrist
2687 CASTRO VALLEY BLVD
CASTRO VALLEY, CA 94546
Alameda County (510) 581-1553
DR. STELLA LEVIN O.D.
Optometrist
2687 CASTRO VALLEY BLVD
CASTRO VALLEY, CA 94546
Alameda County (510) 538-3937
GARY A OSIAS
Optometrist
2687 CASTRO VALLEY BLVD
CASTRO VALLEY, CA 94546
Alameda County (510) 581-1553

Frequently Asked Questions NPPES & CMS

Common questions about this NPI record, answered from the official NPPES registry and CMS datasets shown on this page.

What is Gary Osias's NPI number?

The NPI number for Gary Osias is 1639230923. It was assigned to this individual provider in the NPPES registry on December 12, 2006.

Where is Gary Osias located?

Gary Osias practices at 2687 Castro Valley Blvd, Castro Valley, CA 94546. The listed phone number is (510) 581-1553.

What is Gary Osias's specialty?

The primary specialty registered for this NPI is Optometrist with taxonomy code 152W00000X.

When was this NPI record last updated?

The NPPES record for Gary Osias was last updated on June 3, 2015. NPI Profile syncs weekly with the NPPES registry data releases published by CMS. This NPI record was last updated 11 years ago. If this record has changed at CMS more recently, you can request an on-demand re-check against the live CMS registry, directly from this page.