Alexander Napoleon Diaz

Primary specialty

Diagnostic Radiology PhysicianTaxonomy code 2085R0202X

License

MD61575447 Issued in WA

Practice address

1959 NE Pacific St
Seattle, WA 98195

Phone

(206) 598-3300

NPI assigned

Mar 28, 2019

Last updated

Oct 3, 2025By 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

Medicare fee-for-service enrollment

Enrolled in WA

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

Diagnostic Radiology

Education

University of California, San Francisco School of Medicine, 2019

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

The Association of University PhysiciansGroup PAC ID 0446162697, 3,484 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• University of Washington Medical Ctr Hospital, Seattle, WA, CCN 500008
• Harborview Medical Center Hospital, Seattle, WA, CCN 500064
• Fred Hutchinson Cancer Center Hospital, Seattle, WA, CCN 500138
• Skagit Valley Hospital Hospital, Mount Vernon, WA, CCN 500003

Merit-based Incentive Payment System (MIPS)

Final score

93.85 of 100Reported as apm

Quality

74.6

Promoting interoperability

100

Improvement activities

40

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine

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, National Provider Directory roles and organizations whose NPPES authorized official is this provider.

• The Association of University Physicians

  dba University of Washington Physicians

  • Anesthesiology Physician
  • Seattle, WA
  • NPI 1023041159

  Diagnostic Radiology

  Medicare reassignment Care Compare group NPD

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

• Fred Hutchinson Cancer Center

  • General Acute Care Hospital
  • Seattle, WA
  • NPI 1164493847
  Care Compare affiliation
• Fred Hutchinson Cancer Center

  • Community/Retail Pharmacy
  • Seattle, WA
  • NPI 1356415699

  Hospital

  Care Compare affiliation
• Harborview Medical Center

  • General Acute Care Hospital
  • Seattle, WA
  • NPI 1053359729
  Care Compare affiliation
• Public Hospital Dist No 1 Skagit

  dba Skagit Valley Hospital

  • General Acute Care Hospital
  • Mount Vernon, WA
  • NPI 1053357244
  Care Compare affiliation
• University of Washington

  dba University of Washington Medical Center

  • General Acute Care Hospital
  • Seattle, WA
  • NPI 1326002049
  Care Compare affiliation

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

{
    "created_epoch": "1553731200000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1759449600000",
    "number": "1518428812",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 50095",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981455095"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1959 NE PACIFIC ST",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "98195",
            "telephone_number": "206-598-3300"
        }
    ],
    "practiceLocations": [
        {
            "address_1": "325 9th Ave",
            "address_purpose": "LOCATION",
            "city": "Seattle",
            "state": "WA",
            "postal_code": "981042420",
            "country_code": "US",
            "telephone_number": "206-520-5000",
            "country_name": "United States",
            "address_type": "DOM"
        }
    ],
    "basic": {
        "last_name": "DIAZ",
        "first_name": "ALEXANDER",
        "middle_name": "NAPOLEON",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2019-03-28",
        "last_updated": "2025-10-03",
        "certification_date": "2025-10-03",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "2085R0202X",
            "taxonomy_group": "",
            "desc": "Radiology, Diagnostic Radiology",
            "state": "WA",
            "license": "MD61575447",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Maria Catalina Diaz Gasca, B.A.
• Alan Eduardo Diaz Montoya
• Karina Diaz-Davis, MD, PHD
• Echo Diaz-Farlight, LMP
• Alexander Joseph Diaz, AGACNP-BC
• Allen Diaz
• Andrea Estefania Diaz
• Ariyanna Diaz
• Brian Diaz, RPH, PHARMD, MS
• Carolyn Victoria Diaz

• Diagnostic Radiology Physician in Seattle, WA
• Providers in Seattle, WA by specialty
• Diagnostic Radiology Physician in Washington

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Oct 3, 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.