Leoncio Ramon Diaz, M.D.

Primary specialty

Pulmonary Disease PhysicianTaxonomy code 207RP1001X

License

202419 Issued in CA

Practice address

2020 Zonal Ave # Ird720
Los Angeles, CA 90089-0121

Phone

(323) 226-7923

NPI assigned

Apr 29, 2022

Sex

Male

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 PA

Eligible to order & refer

• Part B services: Yes
• Medical equipment: Yes
• Home health: Yes
• Power mobility devices: Yes
• Hospice: Yes

Green means eligible to order or refer.

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

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.

• Usc Care Medical Group, Inc

  • General Practice Physician
  • Los Angeles, CA
  • NPI 1902846306
  NPD (past)

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

{
    "created_epoch": "1651190400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1757548800000",
    "number": "1609511161",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2020 ZONAL AVE # IRD720",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900890121"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2020 ZONAL AVE # IRD720",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900890121",
            "telephone_number": "323-226-7923"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "DIAZ",
        "first_name": "LEONCIO",
        "middle_name": "RAMON",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2022-04-29",
        "last_updated": "2025-09-11",
        "certification_date": "2025-06-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RP1001X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Pulmonary Disease",
            "state": "CA",
            "license": "202419",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Kayleen Diaz
• Kenya Diaz
• Kristal Diaz
• Laura Diaz, LCSW
• Laura E Diaz
• Liana Cristina Diaz, LCSW
• Liliana Diaz
• Lourdes Diaz
• Lucas F Diaz
• Lucia Elia Diaz

• Pulmonary Disease Physician in Los Angeles, CA
• Providers in Los Angeles, CA by specialty
• Pulmonary Disease Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 11, 2025; 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.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.