Viet Sean Nguyen, MD

Primary specialty

General Practice PhysicianTaxonomy code 208D00000X

License

A189934 Issued in CA

Practice address

4445 Magnolia Ave
Riverside, CA 92501-4135

Phone

(951) 788-3000

NPI assigned

Mar 24, 2022

Sex

Male

Sole proprietor

Yes

Registry information is reported by the provider to CMS and is not verified. About this source

Specialties & licenses 3

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

Emergency Medicine

Education

Univ of Central Florida, College of Medicine, 2022

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Cep America - CaliforniaGroup PAC ID 6103739131, shared by 2 NPIs, 1,278 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Riverside Community Hospital Hospital, Riverside, CA, CCN 050022
• Pomona Valley Hospital Medical Center Hospital, Pomona, CA, CCN 050231

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• FHIR API: https://api.platform.athenahealth.com/18095/brand/2/csg/1/fhir/r4

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.

• Cep America - California

  • Emergency Medicine Physician
  • San Francisco, CA
  • NPI 1023063542
  Medicare reassignment NPD
• Cep America - California

  • Emergency Medicine Physician
  • Santa Ana, CA
  • NPI 1548667843
  Medicare reassignment NPD
• Mountain View Emergency Physicians Medical Group, Inc.

  • Emergency Medicine Physician
  • Upland, CA
  • NPI 1619923653
  Medicare reassignment NPD
• Mountain View Urgent Care Group, Inc

  • Emergency Medicine Physician
  • Fontana, CA
  • NPI 1023306784
  Medicare reassignment NPD
• Cep America - California

  • Emergency Medicine Physician
  • Riverside, CA
  • NPI 1386750578
  NPD
• Cep America - California

  • Emergency Medicine Physician
  • Pomona, CA
  • NPI 1740235258
  NPD
• Cep America-California

  • Emergency Medicine Physician
  • Murrieta, CA
  • NPI 1588552848
  NPD
• Mountain View Urgent Care Group, Inc

  • Emergency Medicine Physician
  • Pomona, CA
  • NPI 1801233036
  NPD

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

• Pomona Valley Hospital Medical Center

  • General Acute Care Hospital
  • Pomona, CA
  • NPI 1407813660
  Care Compare affiliation
• Riverside Healthcare System, L.P.

  • General Acute Care Hospital
  • Riverside, CA
  • NPI 1114971660
  Care Compare affiliation

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

{
    "created_epoch": "1648080000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1753660800000",
    "number": "1902556855",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "4445 MAGNOLIA AVE",
            "city": "RIVERSIDE",
            "state": "CA",
            "postal_code": "925014135"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "4445 MAGNOLIA AVE",
            "city": "RIVERSIDE",
            "state": "CA",
            "postal_code": "925014135",
            "telephone_number": "951-788-3000"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "NGUYEN",
        "first_name": "VIET",
        "middle_name": "SEAN",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2022-03-24",
        "last_updated": "2025-07-28",
        "certification_date": "2025-07-28",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207P00000X",
            "taxonomy_group": "",
            "desc": "Emergency Medicine",
            "state": "CA",
            "license": "A189934",
            "primary": false
        },
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "208D00000X",
            "taxonomy_group": "",
            "desc": "General Practice",
            "state": "CA",
            "license": "A189934",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Trieu Nguyen
• Trinh Nguyen
• Tu Anh Nguyen, RPH
• Tuong C Nguyen, M.D.
• Victor Nguyen, PHARM.D.
• Vinh Nguyen
• Vinh Thanh Nguyen
• Vivian Van Nguyen
• Vy Nguyen, PHARMD
• William Nguyen

• General Practice Physician in Riverside, CA
• Providers in Riverside, CA by specialty
• General Practice Physician in California

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Jul 28, 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.