Dr. William Thomas Simonson, MD, PhD
- Medicare services, 2024
- 2,634
- Medicare patients, 2024
- 1,138
- Hospital affiliations
- 5
- Industry payments
- $259
- Medical groups
- 2
- Practice address
- 12501 E Marginal S Way, Tukwila, WA 98168
- Practice phone
- Call (206) 576-6094
- Professional email
- Get professional email
- Personal email
- Get personal email
- Mobile number
- Get mobile number
Primary practice
Cellnetix Pathology
Tukwila, Washington
Find Dr. Simonson's professional email, personal email and mobile number
Dmand AI checks each channel through healthcare-specific waterfall enrichment. See what is on file with a free account, with practice phones, licenses and affiliations.
Dr. William Thomas Simonson is a pathologist in Tukwila, Washington
Dr. Simonson practices at Cellnetix Pathology in Tukwila, Washington.
Dr. Simonson's NPI, 1306080262, was assigned on April 22, 2009. Dr. Simonson graduated from University of Wisconsin School of Medicine in 2009. Dr. Simonson holds Washington license MD60295980.
- NPI
- 1306080262NPI Registry (opens in a new tab)
- Medicare PAC ID
- 4688894512
- NPI enumeration date
- April 22, 2009
- NPI status
- Active
- Accepts Medicare assignment
- Yes
- Practice phone
- (206) 576-6094
- Professional email
- Get email
- Personal email
- Get email
- Mobile number
- Get number
- Sex
- Male
- Estimated age
- 43
- Medical school graduation
- 2009
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; Dmand AI Practice Data; and Doctors and Clinicians National Downloadable File (CMS)
Dr. William Thomas Simonson practices at Cellnetix Pathology in Tukwila, Washington
Dr. Simonson's primary practice is Cellnetix Pathology, at 12501 E Marginal S Way, Tukwila, WA 98168 in King County. The practice phone is (206) 576-6094.
- Cellnetix Pathology12501 E Marginal S Way, Tukwila, WA 98168 · King CountyPhone(206) 576-6094
Sources: NPPES NPI Registry (CMS); and Dmand AI Practice Data
Dr. William Thomas Simonson is affiliated with 6 sites of care and 2 medical groups
Dr. Simonson's primary practice is Cellnetix Pathology in Tukwila, Washington. Dr. Simonson is also affiliated with MultiCare Tacoma General Hospital. The medical group on file is CellNetix Pathology & Laboratories. Dmand AI also links Dr. Simonson to 4 more hospitals and 1 medical group, each named with a free account.
Sources: NPPES NPI Registry (CMS); Dmand AI Practice Data; Dmand AI Affiliation Data; and Dmand AI Org Hierarchy Data
Dmand AI tracks the EHR system at Dr. William Thomas Simonson's practice
Dmand AI tracks the electronic health record (EHR) system at each site where Dr. Simonson practices, 5 sites in all. Vendor and product names are available with a free account.
| Site | EHR vendor and product |
|---|---|
| Cellnetix Pathology | Available with a free account |
| +5 more sites and 1 medical group | Available with a free account |
Source: Dmand AI Technology Install Data
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Dr. William Thomas Simonson is one of 217 pathologists in Washington
Anatomic pathology and clinical pathology is Dr. Simonson's primary specialty in the NPI Registry, under taxonomy code 207ZP0102X. Dr. Simonson is licensed in Washington.
Specialties and state licenses
- Anatomic pathology and clinical pathology, WashingtonPrimary
Pathologists near Dr. Simonson
Counts of pathologists with a Dmand AI profile, by place and practice. Each opens the list.
Sources: NPPES NPI Registry (CMS); Dmand AI Professional Profile Data; and Dmand AI Peer Benchmarks
Dr. William Thomas Simonson billed Medicare for 2,634 services in 2024
CMS data shows 2,634 Medicare services from Dr. Simonson across 19 procedure codes in 2024, for 1,138 Medicare patients. Medicare paid $59,409 for them.
Dr. Simonson's Medicare services by type, 2023 to 2024
- 2023
- 2024
- Lab and pathology
- 2023: 6,1952024: 2,57158%
- Surgery
- 2023: 1182024: 6347%
Where Dr. Simonson's Medicare services took place, 2024
- In an office84032%
- In a facility1,79468%
Dr. Simonson compared with the Washington median for pathologists, 2024
- Dr. Simonson
- Washington median
- Medicare services
- 2,634vs 1,42685% above
- Medicare patients
- 1,138vs 62084% above
Medians across 205 pathologists in Washington with Dmand AI profiles that report each measure.
Dr. Simonson's most billed Medicare procedure codes, 2024
CMS publishes codes billed for 11 or more Medicare patients. Each label is the code family; CPT descriptions are licensed by the AMA.
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Medicare shows one payer. Book a meeting to get commercial claims data for Dr. Simonson and other pathologists in Washington.
Sources: Medicare Physician & Other Practitioners - by Provider and Service (CMS), 2024 data; and Dmand AI Peer Benchmarks
Dr. William Thomas Simonson treated 1,138 Medicare patients in 2024, average age 76
CMS counts 1,138 Medicare patients who saw Dr. Simonson in 2024. The largest group is 75 to 84, with 457 patients. 75% of them have high blood pressure, and 75% have high cholesterol. 11% are also on Medicaid. Their average risk score is 1.77, where 1.00 is the Medicare average, so they are sicker than most Medicare patients.
Across all payers, Dmand AI patient panel data puts Dr. Simonson's median patient age at 45, with 68% women.
Dr. Simonson's Medicare patients by age, 2024
Dr. Simonson's Medicare patients by sex, 2024
- Women59652%
- Men54248%
Chronic conditions among Dr. Simonson's Medicare patients, 2024
- High blood pressure75%
- High cholesterol75%
- Arthritis54%
- Chronic kidney disease41%
- Ischemic heart disease33%
- Diabetes32%
- Heart failure30%
- Atrial fibrillation28%
Share of Medicare patients with each condition. A patient can have several.
Dr. Simonson's patients across all payers
Dmand AI patient panel data covers Medicare, Medicaid and commercial patients.
Patient panel by age, all payers
Median age 45
Patient panel by sex, all payers
- Women68%
- Men31%
Sources: Dmand AI Patient Panel Data; and Medicare Physician & Other Practitioners - by Provider (CMS), 2024 data
How Dr. William Thomas Simonson takes part in Medicare
Dr. Simonson accepts Medicare assignment, so Medicare's approved amount is taken as full payment.
- Accepts Medicare assignment
- Yes
Source: Doctors and Clinicians National Downloadable File (CMS)
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Dr. William Thomas Simonson received $259 in industry payments from 2021 to 2025
CMS Open Payments shows 4 general payments to Dr. Simonson from 4 drug and device companies from 2021 to 2025. Food and beverage make up the largest share, 100% of the total. Adaptive Biotechnologies Corporation paid the most, $163.
General payments to Dr. Simonson by program year, 2021 to 2025
Companies that paid Dr. Simonson the most, 2021 to 2025
Share is of all general payments to this clinician.
Source: Open Payments (CMS), 2025 data, released July 7, 2026
Dr. William Thomas Simonson graduated from University of Wisconsin School of Medicine
Dr. Simonson graduated from University of Wisconsin School of Medicine in 2009.
- Medical school
Source: Dmand AI Professional Profile Data
Sources for Dr. William Thomas Simonson's profile data
| Data on this page | Source |
|---|---|
| NPI, name, sex, specialty and licenses | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Professional Profile Data |
| Practice locations and phone | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice Data |
| Primary practice, affiliations and health system | NPPES NPI Registry (CMS) (opens in a new tab)Dmand AI Practice DataDmand AI Affiliation DataDmand AI Org Hierarchy Data |
| Medicare services and procedure codes | Medicare Physician & Other Practitioners - by Provider and Service (CMS) (opens in a new tab) |
| State medians for the same specialty | Dmand AI Peer Benchmarks |
| Medicare patients and the all-payer patient panel | Dmand AI Patient Panel DataMedicare Physician & Other Practitioners - by Provider (CMS) (opens in a new tab) |
| MIPS scores, telehealth, assignment and procedure percentiles | Doctors and Clinicians National Downloadable File (CMS) (opens in a new tab) |
| Industry payments | Open Payments (CMS) (opens in a new tab) |
| Training, board certification and memberships | Dmand AI Professional Profile Data |
| EHR at each practice site | Dmand AI Technology Install Data |
| Similar physicians | Dmand AI Affiliation Data |
Data last refreshed October 2026Report an inaccuracyRemove my information
FAQ
Frequently asked questions about Dr. William Thomas Simonson
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What is Dr. William Thomas Simonson's NPI number?
Dr. William Thomas Simonson's NPI number is 1306080262. It was assigned on April 22, 2009, and it is active in the NPI Registry.
What kind of doctor is Dr. William Thomas Simonson?
Dr. William Thomas Simonson is a pathologist in Tukwila, Washington. The primary specialty in the NPI Registry is Anatomic Pathology & Clinical Pathology Physician (taxonomy code 207ZP0102X).
Where does Dr. William Thomas Simonson practice?
Dr. Simonson practices at 12501 E Marginal S Way, Tukwila, WA 98168. Dr. Simonson's primary practice is Cellnetix Pathology in Tukwila, Washington. Dmand AI also links Dr. Simonson to 4 hospitals and 1 medical group.
What is Dr. William Thomas Simonson's office phone number?
The practice phone on file for Dr. Simonson is (206) 576-6094.
What is Dr. William Thomas Simonson's medical license number?
Dr. Simonson holds Washington license MD60295980.
Which hospitals is Dr. William Thomas Simonson affiliated with?
Dr. Simonson is affiliated with MultiCare Tacoma General Hospital. Dmand AI links Dr. Simonson to 4 more hospitals.
What medical group is Dr. William Thomas Simonson part of?
Dr. Simonson is linked to CellNetix Pathology & Laboratories. Dmand AI links Dr. Simonson to 1 more medical group.
Does Dr. William Thomas Simonson accept Medicare?
Yes. CMS data shows Dr. Simonson billed Medicare for 2,634 services in 2024, and Dr. Simonson accepts Medicare assignment.
How many Medicare patients does Dr. William Thomas Simonson see?
CMS counts 1,138 Medicare patients who saw Dr. Simonson in 2024, with an average age of 76.
What services does Dr. William Thomas Simonson bill to Medicare?
In 2024, Dr. Simonson's most billed Medicare services were lab and pathology test (84165), lab and pathology test (86334) and lab and pathology test (88305).
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Where did Dr. William Thomas Simonson go to medical school?
Dr. Simonson graduated from University of Wisconsin School of Medicine in 2009.
Has Dr. William Thomas Simonson received payments from drug or device companies?
CMS Open Payments shows $259 in general payments to Dr. Simonson from 4 companies from 2021 to 2025. The largest total came from Adaptive Biotechnologies Corporation.
How long has Dr. William Thomas Simonson been practicing?
Dr. Simonson graduated from medical school in 2009, 17 years ago.
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