Alexander Mayhew Olson, MD

Primary specialty

Anesthesiology PhysicianTaxonomy code 207L00000X

License

MD70019201 Issued in WA

Practice address

1100 9TH Ave
Seattle, WA 98101-2756

Phone

(206) 223-6980

Fax

(206) 223-6982

NPI assigned

Mar 28, 2021

Last updated

Feb 26, 2026By the provider in NPPES

Sex

Male

Sole proprietor

Yes

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

Anesthesiology

Education

Other, 2021

Medicare assignment

May accept Medicare assignment

Practice addresses (Care Compare)

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

• The Association of Chrmc and University Physicians

  dba Children's University Medical Group

  • Pediatrics Physician
  • Seattle, WA
  • NPI 1255449963
  Medicare reassignment
• Virginia Mason Medical Center

  • General Acute Care Hospital
  • Seattle, WA
  • NPI 1801851258
  Medicare reassignment
• Virginia Mason Medical Center

  dba Virginia Mason Medical Center-Winslow Clinic

  • Family Medicine Physician
  • Bainbridge Island, WA
  • NPI 1730237942
  NPD
• Virginia Mason Medical Center

  dba St Joseph Medical Center

  • Interventional Cardiology Physician
  • Tacoma, WA
  • NPI 1821711953
  NPD

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

{
    "created_epoch": "1616889600000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1772064000000",
    "number": "1033796651",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "PO BOX 741515",
            "city": "LOS ANGELES",
            "state": "CA",
            "postal_code": "900741515",
            "telephone_number": "206-223-6980",
            "fax_number": "206-223-6982"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "1100 9TH AVE",
            "city": "SEATTLE",
            "state": "WA",
            "postal_code": "981012756",
            "telephone_number": "206-223-6980",
            "fax_number": "206-223-6982"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "OLSON",
        "first_name": "ALEXANDER",
        "middle_name": "MAYHEW",
        "credential": "MD",
        "sole_proprietor": "YES",
        "sex": "M",
        "enumeration_date": "2021-03-28",
        "last_updated": "2026-02-26",
        "certification_date": "2026-02-26",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207L00000X",
            "taxonomy_group": "",
            "desc": "Anesthesiology",
            "state": "WA",
            "license": "MD70019201",
            "primary": true
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Stephen B Olsen, M.D.
• Tracey Lynn Olsen, PTA
• Ora Anne Olsommer, P.AC
• Kristina Marie Olson-Kuyper, ND
• Alan Warren Olson
• Ashley Rae Olson
• Aubrey Olson
• Brian Olson, LMHCA
• Bruce Arthur Olson, PH.D
• Bryan Daniel Olson, DDS

• Anesthesiology Physician in Seattle, WA
• Providers in Seattle, WA by specialty
• Anesthesiology Physician in Washington

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 26, 2026; 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.