William Thomas Simonson, MD PHD

Primary specialty

Anatomic Pathology & Clinical Pathology PhysicianTaxonomy code 207ZP0102X

License

MD60295980 Issued in WA

Practice address

315 Martin Luther King Jr Way
Western Washington Pathology
Tacoma, WA 98405-4234

Phone

(253) 403-1043

NPI assigned

Apr 22, 2009

Sex

Male

Sole proprietor

No

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

Specialties & licenses 2

Addresses

Medicare fee-for-service enrollment

Enrolled in WA, AZ2 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 2

Specialty

Pathology

Education

University of Wisconsin School of Medicine, 2009

Medicare assignment

Accepts the Medicare-approved amount as payment in full

Group practices

Cellnetix Pathology PLLCGroup PAC ID 8224062971, shared by 3 NPIs, 58 clinicians

Practice addresses (Care Compare)

Hospital & facility affiliations

• Tacoma General Allenmore Hospital Hospital, Tacoma, WA, CCN 500129
• Multicare Good Samaritan Hospital Hospital, Puyallup, WA, CCN 500079
• St. Mary'S Hospital Hospital, Tucson, AZ, CCN 030010
• Deaconess Medical Center Hospital, Spokane, WA, CCN 500044
• Multicare Auburn Medical Center Hospital, Auburn, WA, CCN 500015

Medicare enrollment (NPD)

Enrolled

Credentials

Doctor of Medicine, Doctor of Philosophy

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.

• Cellnetix Pathology, PLLC

  • Anatomic Pathology & Clinical Pathology Physician
  • Everett, WA
  • NPI 1356310866
  Medicare reassignment NPD
• Western Washington Pathology PS

  • Anatomic Pathology & Clinical Pathology Physician
  • Tacoma, WA
  • NPI 1073650610
  Medicare reassignment NPD
• Cellnetix Pathology, PLLC

  • Anatomic Pathology & Clinical Pathology Physician
  • Tucson, AZ
  • NPI 1598624207
  Medicare reassignment NPD
• Cellnetix Pathology, PLLC

  • Anatomic Pathology & Clinical Pathology Physician
  • Seattle, WA
  • NPI 1972563385
  NPD

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

• Multicare Health System

  • General Acute Care Hospital
  • Auburn, WA
  • NPI 1255327201
  Care Compare affiliation
• Multicare Health System

  • General Acute Care Hospital
  • Spokane, WA
  • NPI 1356528269
  Care Compare affiliation
• Multicare Health System

  • General Acute Care Hospital
  • Tacoma, WA
  • NPI 1366556227
  Care Compare affiliation
• Multicare Health System

  • General Acute Care Hospital
  • Puyallup, WA
  • NPI 1841231461
  Care Compare affiliation
• SMSJ Tucson Holdings LLC

  • General Acute Care Hospital
  • Tucson, AZ
  • NPI 1265818488
  Care Compare affiliation

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

{
    "created_epoch": "1240358400000",
    "enumeration_type": "NPI-1",
    "last_updated_epoch": "1772150400000",
    "number": "1306080262",
    "addresses": [
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "MAILING",
            "address_type": "DOM",
            "address_1": "315 MARTIN LUTHER KING JR WAY",
            "address_2": "WESTERN WASHINGTON PATHOLOGY",
            "city": "TACOMA",
            "state": "WA",
            "postal_code": "984054234",
            "telephone_number": "253-403-1043"
        },
        {
            "country_code": "US",
            "country_name": "United States",
            "address_purpose": "LOCATION",
            "address_type": "DOM",
            "address_1": "315 MARTIN LUTHER KING JR WAY",
            "address_2": "WESTERN WASHINGTON PATHOLOGY",
            "city": "TACOMA",
            "state": "WA",
            "postal_code": "984054234",
            "telephone_number": "253-403-1043"
        }
    ],
    "practiceLocations": [],
    "basic": {
        "last_name": "SIMONSON",
        "first_name": "WILLIAM",
        "middle_name": "THOMAS",
        "credential": "MD PHD",
        "sole_proprietor": "NO",
        "sex": "M",
        "enumeration_date": "2009-04-22",
        "last_updated": "2026-02-27",
        "certification_date": "2026-02-27",
        "status": "A"
    },
    "taxonomies": [
        {
            "code": "207ZP0102X",
            "taxonomy_group": "",
            "desc": "Pathology, Anatomic Pathology & Clinical Pathology",
            "state": "WA",
            "license": "MD60295980",
            "primary": true
        },
        {
            "code": "207ZP0102X",
            "taxonomy_group": "",
            "desc": "Pathology, Anatomic Pathology & Clinical Pathology",
            "state": "AZ",
            "license": "79372",
            "primary": false
        }
    ],
    "identifiers": [],
    "endpoints": [],
    "other_names": []
}

• Jaimey Kristin Simons
• Patricia A Simons, L.M.F.T.
• Tina Michelle Simons, LMP
• Hayden Scott Simonson, PA-C
• Mary Kristine Simonson, M.D.
• Simply Human Psychiatry PLLC
• Brian Lloyd Simpson, DDS
• Debra Marie Simpson, N.P.
• Duncan Charles Simpson, LISW, LICDC
• Kelly Shaun Simpson, CRNA

• Anatomic Pathology & Clinical Pathology Physician in Tacoma, WA
• Providers in Tacoma, WA by specialty
• Anatomic Pathology & Clinical Pathology Physician in Washington

• NPPES NPI Registry (CMS): identity, addresses, specialties, licenses, identifiers and endpoints. Last updated by the provider on Feb 27, 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.