Alfonso Francisco Siu, MD

Primary specialty

Critical Care Medicine (Internal Medicine) PhysicianTaxonomy code 207RC0200X

License

MD.MD.70106458 Issued in WA

Practice address

1700 13TH St
Everett, WA 98201-1689

Phone

(404) 740-4807

NPI assigned

Mar 29, 2020

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

Medicare fee-for-service enrollment

Enrolled in MN

Enrollment records 1

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

State licenses

Practice roles

Locations

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.

• Ridgeview Medical Center

  • Certified Registered Nurse Anesthetist
  • Waconia, MN
  • NPI 1528364429
  Medicare reassignment NPD
• Ridgeview Medical Center

  • Diagnostic Radiology Physician
  • Waconia, MN
  • NPI 1811174923
  NPD

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

{
    "created_epoch": "1585440000000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1776988800000",
    "number": "1619505492",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "40 W 3RD AVE APT 903",
            "city": "SAN MATEO",
            "state": "CA",
            "postal_code": "944027117",
            "telephone_number": "404-740-4807"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1700 13TH ST",
            "city": "EVERETT",
            "state": "WA",
            "postal_code": "982011689",
            "telephone_number": "404-740-4807"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SIU",
        "first_name": "ALFONSO",
        "middle_name": "FRANCISCO",
        "name_prefix": "Dr.",
        "credential": "MD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2020-03-29",
        "last_updated": "2026-04-24",
        "certification_date": "2026-04-24",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "390200000X",
            "taxonomy_group": "",
            "desc": "Student in an Organized Health Care Education/Training Program",
            "state": null,
            "license": null,
            "primary": false
        },
        {
            "code": "208M00000X",
            "taxonomy_group": "",
            "desc": "Hospitalist",
            "state": "MN",
            "license": "75236",
            "primary": false
        },
        {
            "code": "207RC0200X",
            "taxonomy_group": "",
            "desc": "Internal Medicine, Critical Care Medicine",
            "state": "WA",
            "license": "MD.MD.70106458",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Martha Isabel Siqueiros, MD
• Hamadi Sisawo
• Erika Sisk
• Matthew S Sisk, M.D.
• Tracy Sisk, LMHCA
• Brandon Siu
• Jenny Siv, M.D.
• Nithya Siva, M.S., CCC-SLP
• Sydney D Sivertsen, MSW, LICSW
• Malgorzata Monika Siwek

• Critical Care Medicine (Internal Medicine) Physician in Everett, WA
• Providers in Everett, WA by specialty
• Critical Care Medicine (Internal Medicine) Physician in Washington

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Apr 24, 2026; self-reported and not verified by CMS. Specialty names from the NUCC taxonomy.
• Medicare enrollment (CMS PECOS): enrollments, PAC IDs and benefit reassignments.
• National Provider Directory (CMS): practice roles, locations, licenses, networks and endpoints.

Verify at the official NPI Registry.