Liam Ghiam, MD, MS

Primary specialty

Radiation Oncology PhysicianTaxonomy code 2085R0001X

License

A165739 Issued in CA

Practice address

3951 Katella Ave Ste 102
Los Alamitos, CA 90720-3303

Phone

(562) 799-3198

Fax

(562) 799-3509

NPI assigned

Sep 28, 2016

Last updated

Jul 10, 2025By 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

Other names 1

• Dr. Alireza Ghiam Professional name

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

Other, 2003

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

UC Regents Department of Radiation OncologyGroup PAC ID 7416904214, 16 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Uci Health-Orange Hospital, Orange, CA, CCN 050348

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine, Master of Science

State licenses

Practice roles

Locations

Networks

• BSC 65 PLUS INDIVIDUAL MAPD

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.

• UC Regents Department of Radiation Oncology

  • Radiation Oncology Physician
  • Orange, CA
  • NPI 1386692473
  Medicare reassignment Care Compare group NPD
• Usc Care Medical Group, Inc

  • General Practice Physician
  • Los Angeles, CA
  • NPI 1902846306
  Medicare reassignment NPD
• Genesiscare USA of California a Medical Corporation

  dba GenesisCare of California A Medical Corporation

  • Radiation Oncology Physician
  • Palm Desert, CA
  • NPI 1861472318
  NPD
• Genesiscare USA of California a Medical Corporation

  dba GenesisCare of California A Medical Corporation

  • Radiation Oncology Physician
  • Modesto, CA
  • NPI 1881624583
  NPD
• Usc Care Medical Group, Inc

  dba Fair Oaks Clinic

  • Durable Medical Equipment & Medical Supplies
  • Pasadena, CA
  • NPI 1427937390
  NPD
• Emanuel Medical Center, Inc.

  • General Acute Care Hospital
  • Turlock, CA
  • NPI 1174615330
  NPD (past)
• Stanford Health Care

  dba Stanford Medical Center A Trade Name for Stanford Health Care

  • General Acute Care Hospital
  • Stanford, CA
  • NPI 1437292927
  NPD (past)
• Stanford Hospital and Clinics

  dba SHC Reference Laboratory

  • Clinical Medical Laboratory
  • Palo Alto, CA
  • NPI 1174698468
  NPD (past)
• Presbyterian Medical Center of the University of Pennsylvania Health S

  dba Uphs Presbyterian Medical Center

  • Skilled Nursing Facility
  • Philadelphia, PA
  • NPI 1760450779
  NPD (past)
• Trustees of the University of Pennsylvania

  • Surgery Physician
  • Radnor, PA
  • NPI 1730293663
  NPD (past)
• Trustees of the University of Pennsylvania

  dba Hospital of the University of Pennsylvania

  • General Acute Care Hospital
  • Philadelphia, PA
  • NPI 1851370910
  NPD (past)

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

• University of California Irvine

  dba University of California Irvine - Cac Urgent Care

  • Urgent Care Clinic/Center
  • Irvine, CA
  • NPI 1518739309

  Hospital

  Care Compare affiliation
• University of California Irvine

  dba Uci Health

  • General Acute Care Hospital
  • Orange, CA
  • NPI 1689608150
  Care Compare affiliation

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

{
    "created_epoch": "1475020800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1752105600000",
    "number": "1689123879",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "3951 KATELLA AVE STE 102",
            "city": "LOS ALAMITOS",
            "state": "CA",
            "postal_code": "907203303",
            "telephone_number": "562-799-3198",
            "fax_number": "562-799-3509"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "3951 KATELLA AVE STE 102",
            "city": "LOS ALAMITOS",
            "state": "CA",
            "postal_code": "907203303",
            "telephone_number": "562-799-3198",
            "fax_number": "562-799-3509"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "GHIAM",
        "first_name": "LIAM",
        "name_prefix": "Dr.",
        "credential": "MD, MS",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2016-09-28",
        "last_updated": "2025-07-10",
        "certification_date": "2025-07-10",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0001X",
            "taxonomy_group": "",
            "desc": "Radiology, Radiation Oncology",
            "state": "CA",
            "license": "A165739",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": [
        {
            "first_name": "ALIREZA",
            "last_name": "GHIAM",
            "prefix": "DR.",
            "credential": "MD, MS",
            "code": "2",
            "type": "Professional Name"
        }
    ]
}

• Genesis Healthcare Partners PC
• James Y Ger, M.D.
• Donald Marc Gershberg, MA MFT
• Mark R Gery, MFT
• Javad Ghalamchi, PHD
• Ghulam Y Dostzada MD Inc
• Gi Consultants, PC
• Erin Imani Gibbs
• Kimberly Marie Gibson, BS
• Alec Michael Giel

• Radiation Oncology Physician in Los Alamitos, CA
• Providers in Los Alamitos, 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 Jul 10, 2025; 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.