Robert Sung Gil Kwon, MD

Primary specialty

Radiation Oncology PhysicianTaxonomy code 2085R0001X

License

A63998 Issued in CA

Practice address

24302 Paseo de Valencia
Laguna Hills, CA 92653-3115

Phone

(949) 452-8880

NPI assigned

Jun 13, 2005

Last updated

Apr 29, 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

Other identifiers 4

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

Temple University School of Medicine, 1995

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Memorialcare Medical FoundationGroup PAC ID 8729277314, 555 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Memorialcare Saddleback Medical Center Hospital, Laguna Hills, CA, CCN 050603
• Uci Health-Orange Hospital, Orange, CA, CCN 050348

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Interoperability endpoints

• Direct secure messaging: rkwon781517@direct.memorialcare.org
• Direct secure messaging: robert.kwon.p105@direct.nautilus.nextgenshare.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.

• Memorialcare Medical Foundation

  • Clinic/Center
  • Fountain Valley, CA
  • NPI 1205167350
  Medicare reassignment Care Compare group
• Cancer Care Consultants Medical Associates

  • Radiation Oncology Physician
  • Santa Monica, CA
  • NPI 1437271798
  NPD (past)
• Genesiscare USA of California a Medical Corporation

  dba GenesisCare of California A Medical Corporation

  • Radiation Oncology Physician
  • Palm Desert, CA
  • NPI 1861472318
  NPD (past)
• Los Alamitos Medical Center, Inc.

  dba Los Alamitos Medical Center

  • Psychiatric Hospital Unit
  • Los Alamitos, CA
  • NPI 1497780084
  NPD (past)
• Third Coast Radiation Oncology Association

  • Radiation Oncology Physician
  • Corpus Christi, TX
  • NPI 1154401685
  NPD (past)

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

• Saddleback Memorial Medical Center

  • General Acute Care Hospital
  • Laguna Hills, CA
  • NPI 1275576381
  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": "1118620800000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1777420800000",
    "number": "1841294337",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "24302 PASEO DE VALENCIA",
            "city": "LAGUNA HILLS",
            "state": "CA",
            "postal_code": "926533115",
            "telephone_number": "949-452-8880"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "24302 PASEO DE VALENCIA",
            "city": "LAGUNA HILLS",
            "state": "CA",
            "postal_code": "926533115",
            "telephone_number": "949-452-8880"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "KWON",
        "first_name": "ROBERT",
        "middle_name": "SUNG GIL",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2005-06-13",
        "last_updated": "2026-04-29",
        "certification_date": "2026-04-29",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0001X",
            "taxonomy_group": "",
            "desc": "Radiology, Radiation Oncology",
            "state": "CA",
            "license": "A63998",
            "primary": true
        }
    ],
    "identifiers": [
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "CIGNA",
            "identifier": "4144250",
            "state": "CA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "AETNA",
            "identifier": "7060429",
            "state": "CA"
        },
        {
            "code": "05",
            "desc": "MEDICAID",
            "issuer": null,
            "identifier": "00A639980",
            "state": "CA"
        },
        {
            "code": "01",
            "desc": "Other (non-Medicare)",
            "issuer": "RR MEDICARE",
            "identifier": "P01730037",
            "state": "CA"
        }
    ],
    "endpoints": [
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://memorialcare.org/fhir/api/FHIR/R4/",
            "affiliation": "Y",
            "endpointDescription": "MemorialCare FHIR Endpoint",
            "affiliationName": "MemorialCare Medical Foundation",
            "use": "HIE",
            "useDescription": "Health Information Exchange (HIE)",
            "contentType": "OTHER",
            "contentTypeDescription": "Other",
            "contentOtherDescription": "FHIR",
            "address_1": "17360 Brookhurst St",
            "city": "Fountain Valley",
            "state": "CA",
            "country_code": "US",
            "postal_code": "927083720",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Martin Paul Kruger, DDS
• Diala Kseibi, DDS
• Samantha Mehta Kubaska, M.D.
• Sara Kumasaka Matsuda
• Kwon Endodontics, Apc
• Sophia Kwong, RPH
• Kyung Myun Kim DDS Corporation
• L. Hamilton MFT, Inc.
• La Paz Chiropractic and Rehab
• La Paz Chiropractic and Rehab

• Radiation Oncology Physician in Laguna Hills, CA
• Providers in Laguna Hills, 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 Apr 29, 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.