NPPES file of Aug 9, 2026

Mason Lang, OD

Optometrist · Union City, CA

Mason Lang, OD is an optometrist with a practice address in Union City, California, and NPI 1407337439, issued on Aug 27, 2018. Check the license (California 34493, as entered in NPPES) with the California board that licenses this profession; the Medicare figures below come from public CMS files.

Record from CMS NPPES, file of Aug 9, 2026 · Medicare files 2024 · method · Verify with CMS →

NPPES recordNPPES file of Aug 9, 2026
1407337439
Name
Mason Lang
Credential
OD
Primary taxonomy
Optometrist 152W00000X
License numbers
34493 CA
008867 NY
Self-reported in NPPES; status is on the state search
Practice location
30600 Dyer St, Union City, CA 94587
Phone
(510) 431-3142
Enumerated
Aug 27, 2018
Record last updated
Jul 12, 2025
Medicare enrollment
Enrolled (PECOS I20241121000217); accepts Medicare assignment
Entity
Type 1 · individual
Public record from CMS NPPES (open it on the CMS NPI Registry). Enrollment, assignment, school and telehealth: CMS Doctors and Clinicians file, Aug 2026. A record is not a license: verify it with the state board.
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8 nearest optometrist records → All 8,308 in California → Look up another NPI →

Also registered at 30600 Dyer St

A shared address usually means a shared clinic or building; it does not show who employs whom.

  1. Connie Choi, O.D.Optometrist1104977693
  2. Yun LinPharmacist1043628407
  3. Ngoc Quyen Luong, PHARMDAmbulatory Care Pharmacist1467933150
  4. Paulina NguyenPharmacist1144638735
  5. Trang TranPharmacist1356884340
  6. Lesanh Trinh, O.D.Optometrist1689720823

Verify Mason Lang in five checks

  1. 1IdentityNPI record in CMS NPPESNPI lookupConfirmed in NPPES
  2. 2LicenseActive license and public ordersWhich California board licenses this profession
    Search for license 34493    Check the board
  3. 3Other statesLicenses and actions elsewhereDocInfo (FSMB)Not checked
  4. 4ExclusionsMedicare and Medicaid bansHHS-OIG exclusion listNot checked
  5. 5CertificationBoard certificationABMS AOA NCCPA AANPNot checked
Find the California license search

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Industry payments in 2024: $402.19

6 payments; by number, the most common kind was food and beverage; the largest payer was CooperVision Inc. The 34,453 providers of this specialty with any payment received $769.99 on average. Payments are reported by manufacturers, not by the provider, and are not a sign of wrongdoing.

  1. Mason Lang$402.19
  2. Specialty average$769.99

Source: CMS Open Payments, program year 2024 (openpaymentsdata.cms.gov); average among providers of this specialty with at least one payment.

Mason Lang among 8,308 optometrist records in California

Mason Lang, OD is one of 8,308 optometrist records with a practice address in California. 67% of them appear in a Medicare file (Part D prescribing, MIPS, Open Payments or Medicare group billing); this one does. Its NPI, issued in 2018, is newer than 79% of them.

  • NPI issued2018 · 79% of these records are older, 19% newer
  • In a Medicare fileYes · 67% of these records are
  • In the CMS Doctors and Clinicians fileYes · 43% of these records are
  • Graduated2014 · median 2008 among the 3,573 with a school on file
  • Record last updated2025 · 67% of these records were not updated in five years or more

Source: CMS NPPES, file of Aug 9, 2026, every record with primary taxonomy 152W00000X and a California practice address; Medicare files: CMS Part D Prescribers 2024, MIPS 2023, Open Payments 2024, Doctors and Clinicians (data.cms.gov).

25 optometrist records list a practice address in Union City

They are 25 of the 1,006 NPPES records with a practice address in Union City, and 8,308 optometrist records in California.

All 8,308 in California → Every provider in Union City → Optometrist nationwide →

The 8 optometrist records with the nearest ZIP codes

  1. Saul Cepeda, ODUnion City, CA 945871073573853
  2. Connie Choi, O.D.Union City, CA 945871104977693
  3. Deborah Deveno, ODUnion City, CA 945871871659433
  4. Trisha Garcia-Herron, O.D.Union City, CA 945871881745529
  5. Vicki Hughes, O.D.Union City, CA 945871639220585
  6. Danny Hum, O.D.Union City, CA 945871700930294
  7. Johnny Jang, O.D.Union City, CA 945871932266798
  8. Vincent Lee, O.D.Union City, CA 945871659425445

Common questions

What is Mason Lang, OD's NPI number?

Mason Lang, OD's National Provider Identifier (NPI) is 1407337439, issued on Aug 27, 2018. An NPI identifies a provider in billing; it is not a license.

Where is Mason Lang, OD located?

The NPPES record lists a practice address at 30600 Dyer St, Union City, CA, 94587. Phone: (510) 431-3142. Providers update this record themselves, so call before visiting.

How can I verify Mason Lang, OD's license?

NPPES lists California license number 34493, as entered by the provider. Search the California board that licenses this profession; the NPPES record confirms identity only.

Source: CMS National Plan and Provider Enumeration System (NPPES), file of Aug 9, 2026 (NPPES files on CMS.gov); NUCC Health Care Provider Taxonomy. Medicare files from data.cms.gov. An NPI identifies who bills; it is not a license.

Written with AI tools from the named public files; every figure is computed from those files (how it is made).

Figures on PlainDoctor are read from the federal files each page names (CMS NPPES, Medicare Part D, MIPS, Open Payments; the HHS-OIG exclusion list only as counts) and from Census population estimates, with the file date shown beside them. See our editorial standards & corrections policy, the methodology behind these numbers, or report a data error. Data current as of Aug 9, 2026.