William Simonson, MD PHD
NPI 1306080262 · Anatomic Pathology & Clinical Pathology Physician · Tacoma, WA
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
William Simonson, MD PHD is a Anatomic Pathology & Clinical Pathology Physician provider in Tacoma, WA (NPI 1306080262).
Provider details
- NPI number
- 1306080262
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD PHD
- Sex
- Male
- Sole proprietor
- No
- License
- MD60295980 (WA)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure25% of score
17 yrs in NPPES registry
- Profile completeness25% of score
100% of core fields populated
- Practice footprint15% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)25% of score
2,634 Medicare services, 2024 (ranked within specialty)
- Open Payments transparency10% of score
Has Open Payments disclosures (2024)
Medicare volume is ranked against active providers in the same specialty. Signals a provider has no public data for (e.g. Medicare claims) are left out of the score entirely — never counted as zero — so providers without that data are not penalized. See the full formula and weights in our .
What this provider does (Medicare)
Based on Medicare fee-for-service claims, 2024; not all care is captured.
| Service (HCPCS) | Medicare services | Typical Medicare-allowed (2024) |
|---|---|---|
| Protein Measurement, Serum84165 | 339 | $17 |
| Protein Measurement, Serum84165 | 317 | $17 |
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 312 | $36 |
| Immunologic Analysis Technique on Serum (immunofixation)86334 | 203 | $17 |
| Immunologic Analysis Technique on Serum (immunofixation)86334 | 199 | $17 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 139 | $27 |
| Blood Smear Interpretation By Physician With Written Report |
Transparency — industry payments
Based on CMS Open Payments, 2024; not all care is captured.
$21 across 1 record (Open Payments 2024)
Open Payments discloses payments and transfers of value (meals, travel, consulting, research, royalties) from drug and device makers to providers. This is a transparency signal, not a verdict — such payments are legal and common, and their presence is neither an endorsement nor a criticism. Source: CMS Open Payments, program year 2024.
Practice location
Mailing address
Registry dates
- Enumerated
- 2009-04-22
- Last updated
- 2026-02-27
- Certified
- 2026-02-27
Frequently asked questions
- What is William Simonson's NPI number?
- William Simonson's National Provider Identifier (NPI) is 1306080262, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is William Simonson's specialty?
- William Simonson is listed in the NPPES registry with a primary specialty of Anatomic Pathology & Clinical Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is William Simonson located?
- William Simonson's practice location on file with NPPES is 315 Martin Luther King Jr Way, Tacoma, WA 98405-4234.
- What is William Simonson's phone number?
- The practice phone number listed in the NPPES registry for William Simonson is (253) 403-1043.
- Does William Simonson accept Medicare?
- William Simonson is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is William Simonson's NPI active?
- Yes — William Simonson's NPI (1306080262) is active in the NPPES registry as of the last update on 2026-02-27.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.