Mary Leong, O.D.

Primary specialty

OptometristTaxonomy code 152W00000X

License

11914T Issued in CA

Practice address

3840 Balfour Rd Ste a
Brentwood, CA 94513-1641

Phone

(925) 513-0323

Fax

(925) 513-8649

NPI assigned

Jan 17, 2007

Sex

Female

Sole proprietor

No

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

Specialties & licenses 1

Addresses

Medicare fee-for-service enrollment

Enrolled in CA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: No
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Specialty

Optometry

Education

Southern California College of Optometry, 2002

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Balfour Vision Optix Optometry IncGroup PAC ID 3375707276, 3 clinicians

Winson Ong ODGroup PAC ID 8820421993, 3 clinicians

Practice addresses (Care Compare)

Medicare enrollment (NPD)

Enrolled

State licenses

Practice roles

Locations

Organizations this provider is connected to: Medicare benefit reassignments (the organization bills Medicare for this provider’s services), Care Compare group memberships and National Provider Directory roles.

• Winson Ong OD

  • Optometrist
  • Antioch, CA
  • NPI 1770130932
  Medicare reassignment Care Compare group NPD
• Balfour Vision Optix Optometry, Inc.

  • Optometrist
  • Brentwood, CA
  • NPI 1649470741
  Medicare reassignment Care Compare group
• Diamond Valley Optometry

  • Optometrist
  • Dublin, CA
  • NPI 1285473611
  Medicare reassignment NPD
• Permanente Medical Group Inc

  • Internal Medicine Physician
  • Santa Clara, CA
  • NPI 1073606299
  Medicare reassignment NPD
• Balfour Vision Optix Optometry Inc.

  • Optometrist
  • Antioch, CA
  • NPI 1760670624
  NPD
• Permanente Medical Group Inc

  • Internal Medicine Physician
  • Richmond, CA
  • NPI 1235226531
  NPD
• Permanente Medical Group, Inc

  • Clinical Medical Laboratory
  • San Jose, CA
  • NPI 1497971584
  NPD

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

{
    "created_epoch": "1168992000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1779667200000",
    "number": "1003968249",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3840 BALFOUR RD STE A",
            "city": "BRENTWOOD",
            "state": "CA",
            "postal_code": "945131641"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3840 BALFOUR RD STE A",
            "city": "BRENTWOOD",
            "state": "CA",
            "postal_code": "945131641",
            "telephone_number": "925-513-0323",
            "fax_number": "925-513-8649"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "5109 Lone Tree Way",
            "address_purpose": "LOCATION",
            "city": "Antioch",
            "state": "CA",
            "postal_code": "945318484",
            "country_code": "US",
            "telephone_number": "925-757-5560",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "LEONG",
        "first_name": "MARY",
        "credential": "O.D.",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2007-01-17",
        "last_updated": "2026-05-25",
        "certification_date": "2026-05-25",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "152W00000X",
            "taxonomy_group": "",
            "desc": "Optometrist",
            "state": "CA",
            "license": "11914T",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Abigail Legault, MS
• Jennifer Lendaris, PCD/CD (DONA), CBS
• Mycalah Anne Lenthe
• Brooke Elizabeth Leonard, AUD
• Lawrence Lin Leong, D.D.S
• Veronica Lewis, OTA
• Chao Li
• Darin Li, DPT
• Weixing Li
• Liberty Dental Group

• Optometrist in Brentwood, CA
• Providers in Brentwood, CA by specialty
• Optometrist in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 25, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments; Order and Referring.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.