Dr Mason Lang OD Inc

Primary specialty

OptometristTaxonomy code 152W00000X

Legal business name

DR MASON LANG OD INC

Practice address

30600 Dyer St
Union City, CA 94587-1717

Phone

(510) 431-3142

Fax

(510) 324-8591

NPI assigned

Dec 8, 2021

Organization subpart

No

Registry information is reported by the provider to CMS and is not verified. About this source

Authorized official

Name

Dr. Mason Lang, ODNPI 1407337439

Title

Owner

Phone

(510) 456-5848

Specialties & licenses 1

Addresses

Other names 1

• Open Eye Optometry Doing business as

Medicare fee-for-service enrollment

Enrolled in CA

Enrollment records 1

Practitioners 1

Individual providers connected to this organization through Medicare benefit reassignment, Care Compare group membership or National Provider Directory roles.

• Mason Lang, OD

  • Optometrist
  • Union City, CA
  • NPI 1407337439
  Medicare reassignment NPD Authorized official

The complete NPPES record for this NPI in the NPI Registry API format.

{
    "created_epoch": "1638921600000",
    "enumeration_type": "NPI-2",
    "last_updated_epoch": "1752278400000",
    "number": "1689333502",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "500 PAWNEE PL",
            "city": "FREMONT",
            "state": "CA",
            "postal_code": "945393306",
            "telephone_number": "510-456-5848"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "30600 DYER ST",
            "city": "UNION CITY",
            "state": "CA",
            "postal_code": "945871717",
            "telephone_number": "510-431-3142",
            "fax_number": "510-324-8591"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "7150 Camino Arroyo",
            "address_purpose": "LOCATION",
            "city": "Gilroy",
            "state": "CA",
            "postal_code": "950207351",
            "country_code": "US",
            "telephone_number": "408-848-1868",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "organization_name": "DR MASON LANG OD INC",
        "organizational_subpart": "NO",
        "enumeration_date": "2021-12-08",
        "last_updated": "2025-07-12",
        "certification_date": "2025-07-12",
        "status": "A",
        "authorized_official_last_name": "LANG",
        "authorized_official_first_name": "MASON",
        "authorized_official_title_or_position": "OWNER",
        "authorized_official_telephone_number": "510-456-5848",
        "authorized_official_name_prefix": "Dr.",
        "authorized_official_credential": "OD"
    },
    "taxonomies": [
        {
            "code": "152W00000X",
            "taxonomy_group": "193400000X SINGLE SPECIALTY  GROUP",
            "desc": "Optometrist",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "organization_name": "Open Eye Optometry",
            "code": "3",
            "type": "Doing Business As"
        }
    ]
}

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• Optometrist in Union City, CA
• Providers in Union City, CA by specialty
• Optometrist in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 12, 2025; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.