Diana Chen, MD, MBA

Primary specialty

Addiction Medicine (Family Medicine) PhysicianTaxonomy code 207QA0401X

License

A188341 Issued in CA

Practice address

2950 International Blvd
Oakland, CA 94601-2228

Phone

(510) 535-4400

NPI assigned

May 25, 2020

Last updated

Jul 30, 2026By the provider in NPPES

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

Enrolled in CA

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Master of Business Administration, Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: dchen137404@santaclaravalley.direct-ci.net
• Direct secure messaging: dchen730900@direct.ochin.org

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.

• Indian Health Center of Santa Clara Valley

  • Federally Qualified Health Center (FQHC)
  • San Jose, CA
  • NPI 1881997963
  Medicare reassignment NPD
• Indian Health Center of Santa Clara Valley

  • Federally Qualified Health Center (FQHC)
  • San Jose, CA
  • NPI 1164643862
  NPD
• Indian Health Center of Santa Clara Valley

  • Federally Qualified Health Center (FQHC)
  • San Jose, CA
  • NPI 1275964488
  NPD

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

{
    "created_epoch": "1590364800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1785369600000",
    "number": "1073136057",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "2950 INTERNATIONAL BLVD",
            "city": "OAKLAND",
            "state": "CA",
            "postal_code": "946012228",
            "telephone_number": "510-535-4400"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "2950 INTERNATIONAL BLVD",
            "city": "OAKLAND",
            "state": "CA",
            "postal_code": "946012228",
            "telephone_number": "510-535-4400"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "401 Quarry Rd Rm 2208",
            "address_purpose": "LOCATION",
            "city": "Palo Alto",
            "state": "CA",
            "postal_code": "943041419",
            "country_code": "US",
            "telephone_number": "650-723-2423",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "795 El Camino Real",
            "address_purpose": "LOCATION",
            "city": "Palo Alto",
            "state": "CA",
            "postal_code": "943012302",
            "country_code": "US",
            "telephone_number": "650-321-4121",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "CHEN",
        "first_name": "DIANA",
        "name_prefix": "Dr.",
        "credential": "MD, MBA",
        "sole_proprietor": "NO",
        "sex": "F",
        "enumeration_date": "2020-05-25",
        "last_updated": "2026-07-30",
        "certification_date": "2026-07-30",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207Q00000X",
            "taxonomy_group": "",
            "desc": "Family Medicine",
            "state": "CA",
            "license": "A188341",
            "primary": false
        },
        {
            "code": "207QA0401X",
            "taxonomy_group": "",
            "desc": "Family Medicine, Addiction Medicine",
            "state": "CA",
            "license": "A188341",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Christine Cheen Chen, ACUPUNCTURIST
• Clara Chen
• Corey Chen
• Cynthia Chen
• David H. Chen, P.T.
• Elizabeth Chen
• Frank Lawrence Chen, DDS
• Hong Chen, L.AC.
• Hua Chen, M.D.
• I-Fei Chen, M.D.

• Addiction Medicine (Family Medicine) Physician in Oakland, CA
• Providers in Oakland, CA by specialty
• Addiction Medicine (Family Medicine) Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 30, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.