HealthCareAtlasUSA

This site republishes official CMS/Medicare Care Compare data. It is not medical advice and does not recommend any specific hospital or treatment — for medical decisions, talk to a doctor.

Doctors / CA

MASON LANG, OD

OPTOMETRY

Graduated: 2014

NPI: 1407337439

Practice Locations (1)

30600 DYER ST

UNION CITY, CA 945871717

5104750206

Source: CMS National Downloadable File, September 2026.

MASON LANG, OD | HealthCareAtlasUSA