Loi Thanh Mai, O.D.

Primary specialty

OptometristTaxonomy code 152W00000X

License

34111 Issued in CA

Practice address

16106 Bellflower Blvd
Bellflower, CA 90706-4606

Phone

(562) 867-4716

Fax

(714) 716-5525

NPI assigned

Sep 2, 2016

Sex

Male

Sole proprietor

Yes

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in NV, CA2 enrollments

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 2

Specialty

Optometry

Education

Other, 2016

Medicare assignment

Accepts the Medicare-approved amount as payment in full

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.

• Loi Thanh Mai OD Inc

  • Optometrist
  • Bellflower, CA
  • NPI 1083436356
  Medicare reassignment NPD Authorized official
• Girisgen & Kopolow OD, PC

  • Optometrist
  • Las Vegas, NV
  • NPI 1427382415
  Medicare reassignment NPD
• Kopolow & Girisgen Professional Corporation

  • Optometrist
  • Las Vegas, NV
  • NPI 1518904622
  Medicare reassignment NPD
• Girisgen & Kopolow OD, PC

  • Optometrist
  • Las Vegas, NV
  • NPI 1457716391
  NPD
• Girisgen & Kopolow OD, PC

  • Optometrist
  • Las Vegas, NV
  • NPI 1841523164
  NPD
• Main Street Optometry

  • Optometrist
  • Santa Ana, CA
  • NPI 1326215492
  NPD (past)

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

{
    "created_epoch": "1472774400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1777334400000",
    "number": "1902353238",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "16106 BELLFLOWER BLVD",
            "city": "BELLFLOWER",
            "state": "CA",
            "postal_code": "907064606",
            "telephone_number": "714-724-1540",
            "fax_number": "714-716-5525"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "16106 BELLFLOWER BLVD",
            "city": "BELLFLOWER",
            "state": "CA",
            "postal_code": "907064606",
            "telephone_number": "562-867-4716",
            "fax_number": "714-716-5525"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "MAI",
        "first_name": "LOI",
        "middle_name": "THANH",
        "credential": "O.D.",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2016-09-02",
        "last_updated": "2026-04-28",
        "certification_date": "2026-04-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "152W00000X",
            "taxonomy_group": "",
            "desc": "Optometrist",
            "state": "CA",
            "license": "34111",
            "primary": true
        },
        {
            "code": "152W00000X",
            "taxonomy_group": "",
            "desc": "Optometrist",
            "state": "NV",
            "license": "894",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Marissa Maria Magcale, PHARMD
• James Vincent Maggiano, OD
• Keron Magness, MD
• Magnificat Medical Clinic Inc
• Cynde Mai, DDS
• Michael C Mai, DDS
• Yen K Mai, DMD
• Jeffrey S. Mallin, MD
• David Mallon, LCSW
• Manale Rehabilitation Network Inc

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

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 28, 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.