Steven Siwei Yu, MD

Primary specialty

Hematology & Oncology PhysicianTaxonomy code 207RH0003X

License

A122462 Issued in CA

Practice address

11180 Warner Ave Ste 351
Fountain Valley, CA 92708-7516

Phone

(714) 698-0300

Fax

(714) 698-0313

NPI assigned

Feb 7, 2012

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 identifiers 2

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

Hematology/OncologyAlso: Internal Medicine

Education

Medical University of South Carolina College of Medicine, 2011

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Telehealth

Offers telehealth services

Group practices

Los Angeles Hematology-Oncology Medical GroupGroup PAC ID 6608819594, 51 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Uci Health-Orange Hospital, Orange, CA, CCN 050348
• Memorialcare Orange Coast Medical Center Hospital, Fountain Valley, CA, CCN 050678
• Hoag Memorial Hospital Presbyterian Hospital, Newport Beach, CA, CCN 050224

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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 and National Provider Directory roles.

• Los Angeles Hematology-Oncology Medical Group

  dba Los Angeles Cancer Network

  • Specialist
  • Los Angeles, CA
  • NPI 1457409674
  Medicare reassignment Care Compare group NPD
• Compassionate Cancer Care Medical Group, Inc.

  • Specialist
  • Fountain Valley, CA
  • NPI 1548248032
  Medicare reassignment NPD
• Los Angeles Hematology-Oncology Medical Group

  • Non-Pharmacy Dispensing Site
  • Glendale, CA
  • NPI 1952516627

  Hematology & Oncology

  NPD
• Anaheim Memorial Medical Center

  • General Acute Care Hospital
  • Anaheim, CA
  • NPI 1295782381
  NPD (past)
• Los Alamitos Medical Center, Inc.

  dba Los Alamitos Medical Center

  • Psychiatric Hospital Unit
  • Los Alamitos, CA
  • NPI 1497780084
  NPD (past)
• Los Angeles Cardiology Associates

  • Specialist
  • Lancaster, CA
  • NPI 1164471868
  NPD (past)
• Orange Coast Memorial Medical Center

  • General Acute Care Hospital
  • Fountain Valley, CA
  • NPI 1497702575
  NPD (past)
• University of California Irvine

  dba UCI Health - Fountain Valley

  • General Acute Care Hospital
  • Fountain Valley, CA
  • NPI 1821002007
  NPD (past)

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

• Hoag Memorial Hospital Presbyterian

  • General Acute Care Hospital
  • Newport Beach, CA
  • NPI 1518951300
  Care Compare affiliation
• Orange Coast Memorial Medical Center

  • General Acute Care Hospital
  • Fountain Valley, CA
  • NPI 1497702575
  Care Compare affiliation
• 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": "1328572800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1747785600000",
    "number": "1659643682",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "11180 WARNER AVE STE 351",
            "city": "FOUNTAIN VALLEY",
            "state": "CA",
            "postal_code": "927087516",
            "telephone_number": "714-698-0300",
            "fax_number": "714-698-0313"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "11180 WARNER AVE STE 351",
            "city": "FOUNTAIN VALLEY",
            "state": "CA",
            "postal_code": "927087516",
            "telephone_number": "714-698-0300",
            "fax_number": "714-698-0313"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "3801 Katella Ave Ste 207",
            "address_purpose": "LOCATION",
            "city": "Los Alamitos",
            "state": "CA",
            "postal_code": "907203382",
            "country_code": "US",
            "telephone_number": "714-698-0300",
            "fax_number": "714-698-0303",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "YU",
        "first_name": "STEVEN",
        "middle_name": "SIWEI",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2012-02-07",
        "last_updated": "2025-05-21",
        "certification_date": "2025-05-21",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207RH0003X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Hematology & Oncology",
            "state": "CA",
            "license": "A122462",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "1659643682",
            "state": "CA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "SID # 113916",
            "identifier": "113916",
            "state": "CA"
        }
    ],
    "endpoints": [],
    "other_names": []
}

• Timothy Michael Young, M.D.
• William Mac Young, M.D.
• Jared Ronald Younger, MD, MPH
• Yu-Nan Hsu Inc
• Betty Chow Yu, MD
• Mindy Yum, BEHAVIORAL TECHNICIA
• Kristi Yumen, RBT
• Samuel Yung, CPO
• Yunjia Shen DO Inc
• Zafar S Khan M.D. a Medical Corporation

• Hematology & Oncology Physician in Fountain Valley, CA
• Providers in Fountain Valley, CA by specialty
• Hematology & Oncology Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on May 21, 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.