John Tomaszewski, MD
NPI 1417993601 · Anatomic Pathology Physician · Buffalo, NY
Enrolled with Medicare as Practitioner - Pathology · source: CMS PECOS Public Provider Enrollment (2026.04.01)
John Tomaszewski, MD is a Anatomic Pathology Physician provider in Buffalo, NY (NPI 1417993601).
Provider details
- NPI number
- 1417993601
- Entity type
- Individual
- Primary specialty
- Anatomic Pathology PhysicianAllopathic & Osteopathic Physicians
- Credential
- MD
- Sex
- Male
- Sole proprietor
- No
- License
- MD020859 (PA)
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
20 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
366 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) |
|---|---|---|
| Antibody Evaluation, Each Additional Single Antibody Stain Procedure88350 | 162 | $26 |
| Special Stained Specimen Slides to Examine Tissue Including Interpretation and Report88313 | 83 | $11 |
| Special Stained Specimen Slides to Examine Tissue, Each Additional Procedure88341 | 33 | $25 |
| Pathology Examination of Tissue Using a Microscope, Intermediate Complexity88305 | 27 | $33 |
| Antibody Evaluation, Initial Single Antibody Stain Procedure88346 | 25 | $32 |
| Special Stained Specimen Slides to Examine Tissue, Initial Procedure88342 | 21 | $31 |
Practice location
Mailing address
Registry dates
- Enumerated
- 2006-06-22
- Last updated
- 2011-10-10
Frequently asked questions
- What is John Tomaszewski's NPI number?
- John Tomaszewski's National Provider Identifier (NPI) is 1417993601, a unique 10-digit ID issued by CMS for use in standard healthcare transactions.
- What is John Tomaszewski's specialty?
- John Tomaszewski is listed in the NPPES registry with a primary specialty of Anatomic Pathology Physician (Allopathic & Osteopathic Physicians).
- Where is John Tomaszewski located?
- John Tomaszewski's practice location on file with NPPES is 100 High St, Buffalo, NY 14203-1126.
- What is John Tomaszewski's phone number?
- The practice phone number listed in the NPPES registry for John Tomaszewski is (716) 859-5600.
- Does John Tomaszewski accept Medicare?
- John Tomaszewski is approved to bill Medicare according to CMS PECOS enrollment data (2026.04.01). Confirm current participation with the provider before scheduling.
- Is John Tomaszewski's NPI active?
- Yes — John Tomaszewski's NPI (1417993601) is active in the NPPES registry as of the last update on 2011-10-10.
Source: CMS NPPES Data Dissemination (June 2026). NPI Central is not affiliated with CMS. Data is provided as-is from the public registry.