Alexander Si Nguyen, M.D.

Primary specialty

Pain Medicine (Anesthesiology) PhysicianTaxonomy code 207LP2900X

License

317013-01 Issued in NY

Practice address

925 Seneca Street
Mail Stop H8-Gme
Seattle, WA 98101

Phone

(206) 583-6079

NPI assigned

Mar 29, 2017

Sex

Male

Sole proprietor

No

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

Specialties & licenses 3

Addresses

Electronic endpoints 2

Medicare fee-for-service enrollment

Enrolled in NY, IL, MI3 enrollments

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 3

Specialty

Anesthesiology

Education

Other, 2017

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Spectrum Health Primary Care PartnersGroup PAC ID 4587568647, 2,283 clinicians

New York UniversityGroup PAC ID 1355232422, 5,925 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Spectrum Health Hospital, Grand Rapids, MI, CCN 230038

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

Interoperability endpoints

• FHIR API: https://epicproxy-pub.et1089.epichosted.com/FHIRProxy/api/FHIR/R4/
• Direct secure messaging: anguyen732251@nyumc.direct-ci.com
• FHIR API: https://epicproxy-pub.et1089.epichosted.com/FHIRProxy/api/FHIR/DSTU2/

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.

• New York University

  • Otolaryngology Physician
  • New York, NY
  • NPI 1851456701

  Anesthesiology

  Medicare reassignment Care Compare group NPD
• Spectrum Health Primary Care Partners

  • Internal Medicine Physician
  • Grand Rapids, MI
  • NPI 1235188673
  Medicare reassignment Care Compare group NPD
• Advocate Health and Hospitals Corporation

  • Multi-Specialty Clinic/Center
  • Oak Brook, IL
  • NPI 1700824455
  Medicare reassignment NPD
• North Shore - Lij Anesthesiology, PC

  • Anesthesiology Physician
  • Chappaqua, NY
  • NPI 1417401266
  Medicare reassignment NPD
• Trustees of Columbia University in the City of New York

  • Surgery Physician
  • New York, NY
  • NPI 1508266347
  Medicare reassignment NPD
• Advocate Health and Hospitals Corporation

  • Children's Hospital
  • Oak Lawn, IL
  • NPI 1508315516
  NPD
• New York University

  • Physical Medicine & Rehabilitation Physician
  • Boynton Beach, FL
  • NPI 1104787613
  NPD
• New York University

  • Anesthesiology Physician
  • Boynton Beach, FL
  • NPI 1952392946
  NPD
• Spectrum Health Primary Care Partners

  • Internal Medicine Physician
  • Grand Rapids, MI
  • NPI 1689499667

  Anesthesiology

  NPD
• Trustees of Columbia University in the City of New York

  • Internal Medicine Physician
  • New York, NY
  • NPI 1699289488
  NPD

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

• Pennock Hospital

  • Critical Access Hospital
  • Hastings, MI
  • NPI 1932695525
  Care Compare affiliation
• Spectrum Health Hospitals

  • General Acute Care Hospital
  • Grand Rapids, MI
  • NPI 1922090554
  Care Compare affiliation

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

{
    "created_epoch": "1490745600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1755734400000",
    "number": "1487186581",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "925 SENECA ST",
            "address_2": "MAIL STOP H8-GME",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981012742",
            "telephone_number": "206-583-6079"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "925 SENECA STREET",
            "address_2": "MAIL STOP H8-GME",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "98101",
            "telephone_number": "206-583-6079"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "4440 W 95th St Dept Of",
            "address_purpose": "LOCATION",
            "city": "Oak Lawn",
            "state": "IL",
            "postal_code": "604532600",
            "country_code": "US",
            "telephone_number": "708-684-8000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "NGUYEN",
        "first_name": "ALEXANDER",
        "middle_name": "SI",
        "name_prefix": "Dr.",
        "credential": "M.D.",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2017-03-29",
        "last_updated": "2025-08-21",
        "certification_date": "2025-08-21",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "NY",
            "license": "317013-01",
            "primary": false
        },
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "IL",
            "license": "036176521",
            "primary": false
        },
        {
            "code": "207LP2900X",
            "taxonomy_group": "",
            "desc": "Anesthesiology, Pain Medicine",
            "state": "NY",
            "license": "317013-01",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [
        {
            "endpointType": "DIRECT",
            "endpointTypeDescription": "Direct Messaging Address",
            "endpoint": "anguyen368509@direct.myadvocateaurora.org",
            "affiliation": "N",
            "use": "DIRECT",
            "useDescription": "Direct",
            "address_1": "4440 W 95th St Dept Of",
            "city": "Oak Lawn",
            "state": "IL",
            "country_code": "US",
            "postal_code": "604532600",
            "country_name": "United States",
            "address_type": "DOM"
        },
        {
            "endpointType": "FHIR",
            "endpointTypeDescription": "FHIR URL",
            "endpoint": "https://EpicFHIR.aurora.org/FHIR/MYAURORA/api/FHIR/DSTU2/",
            "affiliation": "N",
            "address_1": "4440 W 95th St Dept Of",
            "city": "Oak Lawn",
            "state": "IL",
            "country_code": "US",
            "postal_code": "604532600",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "other_names": []
}

• Annie H Nguyen-Vermillion, MD
• Aaron Loc Nguyen
• Aimee Nguyen
• Aivy Nguyen
• Alex Nguyen, DPT
• Amanda Nguyen
• Andrew Nguyen
• Andrew Anhvu Nguyen, DO
• Andy Nhat Nguyen, MD
• Angela Nguyen

• Pain Medicine (Anesthesiology) Physician in Seattle, WA
• Providers in Seattle, WA by specialty
• Pain Medicine (Anesthesiology) Physician in Washington

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