DR MASON LANG OD INC
NPI 1689333502
Optometrist in Union City, CA

Q: What is Dr Mason Lang Od Inc's NPI number?

The NPI number for Dr Mason Lang Od Inc is 1689333502. It was assigned to this organization in the NPPES registry on December 8, 2021. The provider is doing business as Open Eye Optometry.

Q: What is Dr Mason Lang Od Inc's specialty?

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

Active since December 08, 2021

30600 DYER ST, UNION CITY, CA 94587(510) 431-3142(510) 324-8591 Get Directions Write a Review

NPPES record last updated: July 12, 2025. Verified against the NPPES registry weekly; last sync: August 09, 2026.

Record update history: Jul 12, 2025, Dec 8, 2021 (2 updates tracked since 2021).

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About Dr Mason Lang Od Inc NPPES

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

DR MASON LANG OD INC (NPI 1689333502), doing business as Open Eye Optometry, is a healthcare organization registered as an optometrist in Union City, California and active in the NPI registry since December 2021. The organization maintains a secondary practice location in Gilroy and lists Mason Lang, Owner, as its authorized official.

NPPES Registry Identity

NPI1689333502

Entity TypeOrganization

Primary Taxonomy152W00000X

Legal Business NameDR MASON LANG OD INC

Location Address30600 DYER STUnion City, CA 94587-1717

Mailing Address500 Pawnee PlFremont, CA 94539-3306 · (510) 456-5848

Phone(510) 431-3142

Fax(510) 324-8591

Organization SubpartNo

Authorized OfficialMason LangOwner · (510) 456-5848

Enumeration DateDecember 8, 2021

Last NPPES UpdateJuly 12, 20252 updates tracked since enumeration

NPPES CertifiedJuly 12, 2025

✔ NPI 1689333502 is a valid, active identifier and passes the ISO check-digit test.

Specialties & Licenses

★ Primary SpecialtyOptometristEye and Vision Services Providers

Taxonomy Code152W00000X

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.

30600 DYER ST, Union City, CA 94587

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Other Names 1

Doing Business AsOpen Eye Optometry

Secondary Practice Location 1

Location 17150 Camino ArroyoGilroy, CA 95020-7351 · Phone (408) 848-1868

Group Practice 1

Group TaxonomyThis provdier is a business group of one or more individual practitioners, all of who practice with the same area of specialization.193400000X SINGLE SPECIALTY GROUP

Other Providers at the Same Location NPPES 11

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

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