Sean Williamson, M.D
NPI 1386805489 · Anatomic Pathology & Clinical Pathology Physician · Detroit, MI
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
Provider details
- NPI number
- 1386805489
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology & Clinical Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- M.D
- Sex
- Male
- Sole proprietor
- No
- License
- 01070511A (IN)
Specialties & taxonomies
Allopathic & Osteopathic Physicians
Profile Score
A profile completeness & documented-activity index — NOT a quality, outcomes, or patient-satisfaction rating.
- Registry tenure28% of score
17 yrs in NPPES registry
- Profile completeness28% of score
100% of core fields populated
- Practice footprint17% of score
1 documented practice location
- Medicare service volume (vs. specialty peers)28% of score
666 Medicare services, 2024 (ranked within specialty)
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 methodology.
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) |
|---|---|---|
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 183 | $33 |
| Pathology Examination of Tissue Using a Microscope, Moderately High Complexity88307 | 148 | $75 |
| Surgical Pathology, Gross and Microscopic Examinations, for Prostate Needle Biopsy, Any MethodG0416 | 131 | $164 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 59 | $26 |
| Pathology Examination of Tissue Using a Microscope, High Complexity88309 | 41 | $133 |
| Pathology Examination of Tissue Using a Microscope, Limited Examination88300 | 29 | $4 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2008-06-20
- Last updated
- 2013-07-14
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.