Mason Lang, OD
- Affiliated sites
- 1
- State licenses
- 2
- Year NPI issued
- 2018
- Practice address
- 30600 Dyer St, Union City, CA 94587-1717
- Practice phone
- Call (510) 431-3142
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Open Eye Optometry
Physician office · Union City, California
Find Mason Lang's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Mason Lang is an optometrist in Union City, California
Mason Lang practices at Open Eye Optometry in Union City, California.
Mason Lang's NPI, 1407337439, was assigned on August 27, 2018. Mason Lang holds California license 34493.
- NPI
- 1407337439NPI Registry (opens in a new tab)
- Medicare PAC ID
- 0042745572
- NPI enumeration date
- August 27, 2018
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (510) 431-3142
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 38
- Medical school graduation
- 2014
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Affiliation Data; and Doctors and Clinicians National Downloadable File (CMS)
Mason Lang practices at Open Eye Optometry in Union City, California
Mason Lang's primary practice is Open Eye Optometry, at 30600 Dyer St, Union City, CA 94587-1717. The practice phone is (510) 431-3142.
- Open Eye Optometry30600 Dyer St, Union City, CA 94587-1717Phone(510) 431-3142
Source: Dmand AI Affiliation Data
Mason Lang is affiliated with 1 site of care
Mason Lang's primary practice is Open Eye Optometry in Union City, California.
Source: Dmand AI Affiliation Data
Dmand AI tracks the EHR system at Mason Lang's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Mason Lang practices. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Open Eye Optometry | Available with a free account |
Source: Dmand AI Technology Install Data
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Mason Lang is one of 7,206 optometrists in California
Optometrist is Mason Lang's primary specialty in the NPI Registry, under taxonomy code 152W00000X. Dmand AI has Mason Lang's licenses on file in 2 states: California and New York.
Specialties and state licenses
- Optometrist, CaliforniaPrimary
- New York license
Optometrists near Mason Lang
Counts of optometrists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Mason Lang's patients have a median age of 52
Across all payers, Dmand AI patient panel data puts Mason Lang's median patient age at 52, with 63% women.
Mason Lang's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 52
Patient panel by sex, all payers
- Women63%
- Men36%
Source: Dmand AI Patient Panel Data
How Mason Lang takes part in Medicare
Mason Lang accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
Sources for Mason Lang's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | Dmand AI Affiliation Data |
| Primary practice, affiliations and health system | Dmand AI Affiliation Data |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel Data |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Mason Lang
Spotted something out of date? Email hello@dmand.ai and we will check the record. Contact details live in the free trial.
What is Mason Lang's NPI number?
Mason Lang's NPI number is 1407337439. It was assigned on August 27, 2018, and it is active in the NPI Registry.
What does Mason Lang specialize in?
Mason Lang is an optometrist in Union City, California. The primary specialty in the NPI Registry is Optometrist (taxonomy code 152W00000X).
Where does Mason Lang practice?
Mason Lang practices at 30600 Dyer St, Union City, CA 94587-1717. Mason Lang's primary practice is Open Eye Optometry in Union City, California.
What is Mason Lang's office phone number?
The practice phone on file for Mason Lang is (510) 431-3142.
What is Mason Lang's medical license number?
Mason Lang holds California license 34493, one of the licenses on file in 2 states.
Which states has Mason Lang been licensed in?
Dmand AI has state licenses on file for Mason Lang in California and New York.
Does Mason Lang accept Medicare?
Yes. CMS lists Mason Lang as accepting Medicare assignment.
How long has Mason Lang been practicing?
Mason Lang graduated from medical school in 2014, 12 years ago.
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