Andrew O. Tam, MD

Primary specialty

Radiation Oncology PhysicianTaxonomy code 2085R0001X

License

A186025 Issued in CA

Practice address

301 W Huntington Dr Ste 120
Arcadia, CA 91007-3487

Phone

(626) 574-3657

Fax

(626) 898-8016

NPI assigned

Apr 13, 2020

Last updated

Mar 4, 2026By the provider in NPPES

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

Electronic endpoints 1

Medicare fee-for-service enrollment

Enrolled in CA

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

Specialty

Radiation Oncology

Education

University of California, San Francisco School of Medicine, 2020

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

City of Hope Medical FoundationGroup PAC ID 3779751656, 964 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• City of Hope Helford Clinical Research Hospital Hospital, Duarte, CA, CCN 050146

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: atam81960@cityofhope.direct-ci.com
• Direct secure messaging: direct@cityofhope.direct-ci.com

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.

• City of Hope Medical Foundation

  dba City of Hope Duarte

  • Hematology & Oncology Physician
  • Duarte, CA
  • NPI 1871886366

  Radiation Oncology

  Medicare reassignment Care Compare group NPD

Hospitals and other facilities this clinician is affiliated with according to Medicare Care Compare.

• City of Hope National Medical Center

  • General Acute Care Hospital
  • Duarte, CA
  • NPI 1750358297
  Care Compare affiliation

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

{
    "created_epoch": "1586736000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1772582400000",
    "number": "1548889298",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 512185",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900510185"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "301 W HUNTINGTON DR STE 120",
            "city": "ARCADIA",
            "state": "CA",
            "postal_code": "910073487",
            "telephone_number": "626-574-3657",
            "fax_number": "626-898-8016"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "209 Fair Oaks Ave",
            "address_purpose": "LOCATION",
            "city": "South Pasadena",
            "state": "CA",
            "postal_code": "910301814",
            "country_code": "US",
            "telephone_number": "626-396-2900",
            "fax_number": "626-396-2900",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "TAM",
        "first_name": "ANDREW",
        "middle_name": "O.",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-04-13",
        "last_updated": "2026-03-04",
        "certification_date": "2026-03-04",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0001X",
            "taxonomy_group": "",
            "desc": "Radiology, Radiation Oncology",
            "state": "CA",
            "license": "A186025",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "direct@cityofhope.direct-ci.com",
            "affiliation": "Y",
            "affiliationName": "CITY OF HOPE MEDICAL FOUNDATION",
            "use": "DIRECT",
            "useDescription": "Direct",
            "address_1": "1500 Duarte Rd",
            "city": "Duarte",
            "state": "CA",
            "country_code": "US",
            "postal_code": "910103012",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Joseph R Tafur, M.D.
• Amalya Tagakchyan
• Brianna Nicole Talamantes, M.S., CCC-SLP, BCBA
• Nancy Talavera
• Talk-Listen-Care Counseling (Matt 11:28)
• Michelle Tan, OTR/L
• Peter Xuepeng Tan, M.D.
• Soon Min Tan, MD
• Liane Yoko Tanahara-Chacon, MSW
• Theodore Tanalega

• Radiation Oncology Physician in Arcadia, CA
• Providers in Arcadia, CA by specialty
• Radiation Oncology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Mar 4, 2026; 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.
• Medicare Care Compare (CMS): clinician profile, group practices, facility affiliations, MIPS scores and star ratings.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.