Nona Eulalia Diongzon Santiago, MD

Primary specialty

Student in an Organized Health Care Education/Training ProgramTaxonomy code 390200000X

Practice address

999 San Bernardino Rd
Upland, CA 91786-4920

Phone

(424) 222-4329

NPI assigned

Nov 13, 2024

Reactivated

Jul 23, 2025

Sex

Female

Sole proprietor

No

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

Not listed in the public Medicare enrollment file

Medicare enrollment (NPD)

Not enrolled

Credentials

Doctor of Medicine

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

{
    "created_epoch": "1731456000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1753315200000",
    "number": "1023832367",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "22228 BOLSA AVE",
            "city": "CARSON",
            "state": "CA",
            "postal_code": "907453024",
            "telephone_number": "424-222-4329"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "999 SAN BERNARDINO RD",
            "city": "UPLAND",
            "state": "CA",
            "postal_code": "917864920",
            "telephone_number": "424-222-4329"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SANTIAGO",
        "first_name": "NONA EULALIA",
        "middle_name": "DIONGZON",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2024-11-13",
        "last_updated": "2025-07-24",
        "certification_date": "2025-07-24",
        "deactivation_date": "2025-06-12",
        "reactivation_date": "2025-07-23",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "106S00000X",
            "taxonomy_group": "",
            "desc": "Behavior Technician",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Victoria Judy Sandoval, MA, AMFT, APCC
• Michael Laurence Sands
• Ian Sandy, M.D.
• Santaniello Orthopaedic Medical Corporation
• John Daniel Santaniello, M.D.
• Tonya M Santiago, NP
• Junette Luann Santos, OTR/L
• Arianna Danielle Santoyo
• Saman Sarani, M.D.
• Darren Sardin

• Student in an Organized Health Care Education/Training Program in Upland, CA
• Providers in Upland, CA by specialty
• Student in an Organized Health Care Education/Training Program in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 24, 2025; 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.