Osvaldo C Arenas-Diaz, M.D.

Primary specialty

SpecialistTaxonomy code 174400000X

License

A34699 Issued in CA

Practice address

218 W Badillo St
Covina, CA 91723-1906

Phone

(626) 332-6243

Fax

(626) 331-1264

NPI assigned

Sep 2, 2005

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

Other identifiers 1

Medicare fee-for-service enrollment

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

Credentials

Doctor of Medicine

State licenses

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

{
    "created_epoch": "1125619200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1783900800000",
    "number": "1043204142",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "218 W BADILLO ST",
            "city": "COVINA",
            "state": "CA",
            "postal_code": "917231906",
            "telephone_number": "626-332-6243",
            "fax_number": "626-331-1264"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "218 W BADILLO ST",
            "city": "COVINA",
            "state": "CA",
            "postal_code": "917231906",
            "telephone_number": "626-332-6243",
            "fax_number": "626-331-1264"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "ARENAS-DIAZ",
        "first_name": "OSVALDO",
        "middle_name": "C",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-09-02",
        "last_updated": "2026-07-13",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "174400000X",
            "taxonomy_group": "",
            "desc": "Specialist",
            "state": "CA",
            "license": "A34699",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00A346990",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Fernando Arellano
• Ismael Arellano
• Janessa Arellano
• Melanie Adelina Arellano, C9991214
• Michelle Arellano I
• Alejandra Arenas
• Devoney Marie Arevalo
• Jodie Elena Arevalo
• Margarita Arguello Gonzalez
• Elaine Roseann Arguello

• Specialist in Covina, CA
• Providers in Covina, CA by specialty
• Specialist in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 13, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.