Edward Ungseok Oh, MD

Primary specialty

Internal Medicine PhysicianTaxonomy code 207R00000X

License

A203095 Issued in CA

Practice address

9961 Sierra Ave
Fontana, CA 92335-6720

Phone

(909) 427-5000

NPI assigned

Apr 6, 2022

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

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

Internal Medicine

Education

Other, 2017

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Southern California Permanente Medical GroupGroup PAC ID 6002729175, 11,250 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Kaiser Foundation Hospital Fontana/Ontario Hospital, Fontana, CA, CCN 050140
• Providence St Mary Medical Center Hospital, Apple Valley, CA, CCN 050300

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• Direct secure messaging: eoh122525@mskcc.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 and National Provider Directory roles.

• Southern California Permanente Medical Group

  • Health Maintenance Organization
  • Riverside, CA
  • NPI 1316979834
  Medicare reassignment Care Compare group NPD
• Southern California Permanente Medical Group

  • Health Maintenance Organization
  • Santa Clarita, CA
  • NPI 1316409410
  NPD
• Southern California Permanente Medical Group

  • Health Maintenance Organization
  • Fontana, CA
  • NPI 1316463763
  NPD

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

• Kaiser Foundation Hospitals

  • General Acute Care Hospital
  • Fontana, CA
  • NPI 1356496772
  Care Compare affiliation
• St. Mary Medical Center

  • Advanced Practice Midwife
  • Apple Valley, CA
  • NPI 1043406440

  Hospital

  Care Compare affiliation
• St. Mary Medical Center

  • General Acute Care Hospital
  • Apple Valley, CA
  • NPI 1669456299
  Care Compare affiliation
• St. Mary Medical Center

  • General Acute Care Hospital
  • Apple Valley, CA
  • NPI 1710109186
  Care Compare affiliation

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

{
    "created_epoch": "1649203200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1761868800000",
    "number": "1376284026",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "9550 ESCONDIDO AVE",
            "city": "HESPERIA",
            "state": "CA",
            "postal_code": "923459120",
            "telephone_number": "909-409-2174"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "9961 SIERRA AVE",
            "city": "FONTANA",
            "state": "CA",
            "postal_code": "923356720",
            "telephone_number": "909-427-5000"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "18300 CA-18",
            "address_2": "Kaiser Hospitalist",
            "address_purpose": "LOCATION",
            "city": "Victorville",
            "state": "CA",
            "postal_code": "92307",
            "country_code": "US",
            "telephone_number": "176-024-2231",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "address_1": "2295 S Vineyard Ave",
            "address_purpose": "LOCATION",
            "city": "Ontario",
            "state": "CA",
            "postal_code": "917617925",
            "country_code": "US",
            "telephone_number": "883-357-4227",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "OH",
        "first_name": "EDWARD",
        "middle_name": "UNGSEOK",
        "name_prefix": "Mr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2022-04-06",
        "last_updated": "2025-10-31",
        "certification_date": "2025-10-31",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207R00000X",
            "taxonomy_group": "",
            "desc": "Internal Medicine",
            "state": "CA",
            "license": "A203095",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Irene H Odom, M.D.
• Tommy Tiong Hien Oei, MD
• Gagik Oganesyan, M.D., PH.D.
• Daniel A Ogaz, CRNA
• Chika U Oguagha, PMHNP
• Stellamaris Ohakamnu, DO
• Jeanette Ojeda
• Ojg Inc
• Isioma Tracy Okafor, LVN
• Theresa Nkechinyerem Okeke, PA-C

• Internal Medicine Physician in Fontana, CA
• Providers in Fontana, CA by specialty
• Internal Medicine Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 31, 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.