Individual provider Active NPI

Ellen Dias de Oliveira Chiang, MD

  • Student in an Organized Health Care Education/Training Program
  • San Francisco, CA
National Provider Identifier
1790425148
Registry record updated Sep 15, 2026
On this page

Key facts

NPPES NPI Registry
Primary specialty
Student in an Organized Health Care Education/Training ProgramTaxonomy code 390200000X
Practice address
521 Parnassus Ave FL 7
San Francisco, CA 94143-2206
Phone
(415) 353-1529
NPI assigned
Mar 31, 2022
Last updated
Sep 15, 2026By the provider in NPPES
Sex
Female
Sole proprietor
No

NPPES NPI Registry

Updated by the provider on Sep 15, 2026

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

Specialties & licenses 2

Specialty (taxonomy)CodeLicenseStatePrimary
Student in an Organized Health Care Education/Training Program 390200000X NU Primary
Emergency Medicine Physician 207P00000X A189306 CA

Addresses

Primary practice location

521 Parnassus Ave FL 7
San Francisco, CA 94143-2206

Mailing address

521 Parnassus Ave FL 7
San Francisco, CA 94143-2206
Phone (415) 353-1529

Medicare participation

Medicare enrollment files
Medicare fee-for-service enrollment
Not listed in the public Medicare enrollment file

National Provider Directory

National Provider Directory
Medicare enrollment (NPD)
Not enrolled
Credentials
Doctor of Medicine

Practice roles

OrganizationSpecialtyStatusNew patients
University of California San Francisco Student in an Organized Health Care Education/Training Program CurrentSince Jun 23, 2024 Accepting new patients

Locations

521 Parnassus Ave
Fl 7
San Francisco, CA 94143
Phone (415) 353-1238

Organizations & group practices 1

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

NPI Registry JSON

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

{
    "created_epoch": "1648684800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1789430400000",
    "number": "1790425148",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "521 PARNASSUS AVE FL 7",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941432206",
            "telephone_number": "415-353-1529"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "521 PARNASSUS AVE FL 7",
            "city": "SAN FRANCISCO",
            "state": "CA",
            "postal_code": "941432206",
            "telephone_number": "415-353-1529"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "CHIANG",
        "first_name": "ELLEN",
        "middle_name": "DIAS DE OLIVEIRA",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2022-03-31",
        "last_updated": "2026-09-15",
        "certification_date": "2026-09-15",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": "NU",
            "license": null,
            "primary": true
        },
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "CA",
            "license": "A189306",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

Other providers in San Francisco, CA

Sources for this page

  • NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Sep 15, 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.