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

John E Tomaszewski, MD

Individual provider Anatomic Pathology Physician · NPI 1417993601

John E Tomaszewski, MD practises Pathology in Buffalo, New York. Graduated from Perelman School of Med at the University of Pennsylvania in 1977, 49 years ago. Practices with University at Buffalo Pathologists Inc, a 23-clinician group and accepts Medicare assignment. Licensed in Pennsylvania.

Years since qualifying
49
Trained at
Perelman School of Med at the University of Pennsylvania
Licensed in
PA
In the registry since
2006
What do these letters mean?
MD — Doctor of Medicine
A physician who completed allopathic medical school.

See every abbreviation used in this directory →

Claim this listing Report a problem Suggest an edit

Practice location Address checks out

100 High St
Buffalo, NY 14203-1126 Not confirmed with CMS for 15 years — call before visiting
Phone: (716) 859-5600
Show map & directions

Directions in Google Maps · Apple Maps · OpenStreetMap

Pin is approximate — placed at the ZIP-code centre, not the exact door.

Specialties & licences

Anatomic Pathology Physician (primary) Taxonomy 207ZP0101X · Licence MD020859 (PA)

Record details

NPI number1417993601
Entity typeIndividual (Type 1)
GenderMale
Credentials MD
Sole proprietorNo
NPI enumeratedJune 22, 2006
Last updated in NPPESOctober 10, 2011

Medicare enrollment

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

Medicare specialtyPATHOLOGY
Medical schoolPERELMAN SCHOOL OF MED AT THE UNIVERSITY OF PENNSYLVANIA
Graduated 1977 (49 years in practice)
Group practice University At Buffalo Pathologists Inc — 23 clinicians
Accepts Medicare assignment Yes — accepts the Medicare-approved amount
Practice locations4 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 patients26
Services billed 378 a service is one billed item, such as a visit, a test or a procedure
Average patient age58

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.

Practises at

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

Colleagues at University at Buffalo Pathologists Inc

Clinicians the CMS Doctors & Clinicians file lists under the same group practice. CMS counts 23 clinicians in the practice; 12 are shown here.

Other providers in Buffalo