Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of August 10, 2026.
NPIDirectory

Mary Leong, OD

Individual provider Optometrist · NPI 1003968249

Mary Leong, OD is an Optometry in Brentwood, California. Graduated from Southern California College of Optometry in 2002, 24 years ago. Practices with Balfour Vision Optix Optometry Inc, a 3-clinician group, works from 2 locations and accepts Medicare assignment. Licensed in California.

Years since qualifying
24
Trained at
Southern California College of Optometry
Licensed in
CA
In the registry since
2007
What do these letters mean?
OD — Doctor of Optometry
An optometrist: examines eyes, prescribes glasses and contacts, and treats many eye conditions.

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Practice location Address checks out

3840 Balfour Rd Ste A
Brentwood, CA 94513-1641
Phone: (925) 513-0323
Fax: (925) 513-8649
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Additional practice locations (1)

  • 5109 Lone Tree Way, Antioch, CA 94531-8484 — (925) 757-5560

Specialties & licences

Optometrist (primary) Taxonomy 152W00000X · Licence 11914T (CA)

Record details

NPI number1003968249
Entity typeIndividual (Type 1)
GenderFemale
Credentials OD
Sole proprietorNo
NPI enumeratedJanuary 17, 2007
Last updated in NPPESMay 25, 2026
Certification dateMay 25, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyOPTOMETRY
Medical schoolSOUTHERN CALIFORNIA COLLEGE OF OPTOMETRY
Graduated 2002 (24 years in practice)
Group practice Balfour Vision Optix Optometry Inc — 3 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

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