Provider records sourced from NPPES (CMS National Plan & Provider Enumeration System). Data current as of October 4, 2026.
NPIDirectory

William Thomas Simonson, MDPHD

Individual provider Anatomic Pathology & Clinical Pathology Physician · NPI 1306080262

William Thomas Simonson, MDPHD practises Pathology in Tacoma, Washington. Graduated from University of Wisconsin School of Medicine in 2009, 17 years ago. Practices with Cellnetix Pathology PLLC, a 58-clinician group and accepts Medicare assignment. Licensed in Arizona and Washington.

Years since qualifying
17
Trained at
University of Wisconsin School of Medicine
Licensed in
AZ, WA
In the registry since
2009
Specialties on file
2
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Practice location Address checks out

315 Martin Luther King Jr Way Western Washington Pathology
Tacoma, WA 98405-4234
Phone: (253) 403-1043
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Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anatomic Pathology & Clinical Pathology Physician (primary) Taxonomy 207ZP0102X · Licence MD60295980 (WA)
Anatomic Pathology & Clinical Pathology Physician Taxonomy 207ZP0102X · Licence 79372 (AZ)

Record details

NPI number1306080262
Entity typeIndividual (Type 1)
GenderMale
Credentials MDPHD
Sole proprietorNo
NPI enumeratedApril 22, 2009
Last updated in NPPESFebruary 27, 2026
Certification dateFebruary 27, 2026

Medicare enrollment

From the CMS Doctors & Clinicians file — this clinician is enrolled in Medicare.

Medicare specialtyPATHOLOGY
Medical schoolUNIVERSITY OF WISCONSIN SCHOOL OF MEDICINE
Graduated 2009 (17 years in practice)
Group practice Cellnetix Pathology Pllc — 58 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations2 on file with Medicare

Medicare patients and services, 2024

From the CMS Medicare Physician & Other Practitioners file for calendar year 2024. It counts Original Medicare patients only, so a practice that mostly sees Medicare Advantage or privately insured patients looks smaller here than it is.

Medicare patients1,138
Services billed 2,770 a service is one billed item, such as a visit, a test or a procedure
Average patient age76

Dollar amounts are not shown. What Medicare pays a practice is gross billings, before staff, premises and tax and including the cost of any drugs it administers, so it is not what a clinician earns.

Payments from drug and device companies, 2025

Drug and device makers are required by federal law (the Physician Payments Sunshine Act) to report what they pay or give to clinicians, and CMS publishes the reports as Open Payments. This is the 2025 program year. A report is a record of a payment, not an allegation of anything, and many are small items such as meals. Only general payments are listed here; research payments and ownership or investment interests are reported separately by CMS and are not shown.

Food and Beverage $163 1 payment · a meal or drink at a meeting or visit, not a fee

Each amount is the sum of what companies reported for that kind of payment in 2025, rounded to the dollar. Not all of it is income to the clinician: a meal is not a fee, a charitable contribution goes to a charity, and a royalty or an acquisition payment is not a salary.

Check a report, or dispute one, at the source in CMS’s own tool, Open Payments. Corrections go through CMS’s dispute process. This site removes a home address on request and asks for no proof, because that is privacy; it will not remove an accurate payment report on request, because that is a statutory public disclosure.

Practises at

Facilities the CMS Facility Affiliation file lists for this clinician. Those with a page here are linked.

  • Multicare Good Samaritan Hospital Hospital · Puyallup, WA · listed as Good Samaritan Hospital
  • Deaconess Medical Center Hospital · Spokane, WA
  • Multicare Auburn Medical Center Hospital · Auburn, WA
  • St. Mary'S Hospital Hospital · Tucson, AZ
  • Tacoma General Allenmore Hospital Hospital · Tacoma, WA

Colleagues at Cellnetix Pathology PLLC

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 58 clinicians in the practice; 12 are shown here.

Other providers in Tacoma