Dr. John E Tomaszewski , MD
Pathology - Anatomic Pathology • Buffalo, NY
100 High St
Buffalo, NY 142031126
This profile restates public CMS/NPPES data; T-MedInfo gives no medical advice — consult a licensed professional, and call 911 for emergencies.
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Dr. John Tomaszewski is listed in NPPES under Pathology - Anatomic Pathology.
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NPI assigned on June 22, 2006; this date does not establish years in practice.
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Published CMS data list 366 Original Medicare Part B services in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Published rows only; this is not a quality measure.
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Published Part B service records, 2024:
- 88350 — Antibody evaluation, each additional single antibody stain procedure: 162 service units.
- 88313 — Special stained specimen slides to examine tissue including interpretation and report: 83 service units.
- 88341 — Special stained specimen slides to examine tissue, each additional procedure: 33 service units.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Units differ by code; these are not visits or a measure of quality.
CPT® only copyright 2023 American Medical Association. All rights reserved. Service names are shortened from CPT Consumer Friendly Descriptors (CMS data, 2024). CPT notice
See all 7 records in the table · Guide: How to read Medicare Part B data
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Fewer Medicare Part B services than 65% of clinicians listed under Pathology - Anatomic Pathology in Buffalo, NY (2024, 13 clinicians with data). Median for this group: 693. Middle half: 196 to 1,010.
Fewer Medicare Part B services than 80% of clinicians listed under Pathology - Anatomic Pathology in New York (2024, 187 clinicians with data). Median for this group: 1,195. Middle half: 558 to 2,151.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024. Billing and prescribing volume is not a quality rating.
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Medicare Part B services went from 165 in 2019 to 366 in 2024.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2019–2024.
Practice Location & Contact Primary Location
100 High St
Buffalo, NY 142031126
Matched by practice address or phone in NPPES. A shared address or phone does not confirm that this clinician works there.
CMS Doctors and Clinicians lists 1 group name: University At Buffalo Pathologists Inc. See the list
Source: CMS Doctors and Clinicians National Downloadable File, release date unavailable.
Listings do not confirm current availability, employment or a shared ownership network.
Medicare Profile & Education
Source: CMS Doctors and Clinicians National Downloadable File
Perelman School Of Med At The University Of Pennsylvania
1977
What Public CMS Data Show
Pathology - Anatomic Pathology: NPPES taxonomy is a reported classification, not proof of board certification.
Medicare patients
26 people with Original Medicare in 2024
It gives a sense of how many people with Medicare this clinician treated that year.
Source: CMS, Medicare Physician & Other Practitioners – by Provider, 2024.
Medicare-allowed amount
About $9,229 in 2024
The total amount Medicare approved for these services in 2024. It includes what Medicare paid and what patients or their other insurance owed, such as the deductible and coinsurance.
It shows the total cost of this clinician's Original Medicare services under Medicare's fee rules.
What this does not show: Medicare-allowed amount
This is not the clinician's income. Part of it can go to a clinic or group practice, staff, equipment or drugs. It is not the price you will pay.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
Paid by Medicare
About $7,258 in 2024
The part of the Medicare-allowed amount that Medicare itself paid in 2024, after patients' deductibles and coinsurance.
The gap between the allowed amount and this number is roughly what patients and their other insurance paid.
What this does not show: Paid by Medicare
This is not the clinician's income and not a measure of quality.
Source: CMS, Medicare Physician & Other Practitioners – by Provider and Service, 2024.
Industry payments (Open Payments)
Fewer than 11 payment records totaling $108.26 in 2020
Drug and medical device companies must report certain payments to doctors and some other clinicians to CMS, such as meals, travel, speaking fees or research funding.
It shows reported financial ties between this clinician and companies. You can ask your clinician about them.
These records are submitted by drug and medical device companies, and a reported payment does not necessarily mean the financial relationship is improper.
General: payments not tied to research, such as meals, travel, consulting or speaking fees.
A reported payment does not necessarily mean the financial relationship is improper. Research payments can go to a hospital or university for a study the clinician leads, not to the clinician personally. Clinicians can dispute records with the company that reported them.
Source: CMS Open Payments, program year 2020.
Years since graduation
49 years (graduated 1977)
CMS Doctors and Clinicians data list 1977 as the year this clinician finished professional school.
It tells you roughly how long ago the clinician finished school.
What this does not show: Years since graduation
It is not the number of years in practice, and more years does not mean better care.
Source: CMS Doctors and Clinicians National Downloadable File.
NPI first issued
2006
The year this clinician's National Provider Identifier (NPI) was issued. An NPI is a unique 10-digit ID that US health care providers use for billing.
What this does not show: NPI first issued
NPIs have been issued only since 2005, so this year is not necessarily when the clinician started practicing.
Source: CMS NPPES NPI Registry.
Accepts Medicare assignment
CMS data list this clinician as accepting Medicare assignment. This means agreeing to take the Medicare-approved amount as full payment for covered services.
With Original Medicare, you usually pay only your deductible and coinsurance, and the office sends the claim to Medicare for you.
Medicare assignment applies to Original Medicare. It does not tell you whether the clinician is in a Medicare Advantage plan's network, accepts other insurance, or is taking new patients.
Source: CMS Doctors and Clinicians; Medicare.gov, “Does your provider accept Medicare as full payment?”
No telehealth indicator
CMS shows this indicator only when recent Medicare claims include telehealth services. The clinician may still offer telehealth; ask the office.
Source: CMS, Telehealth Indicator on Medicare Care Compare (fact sheet, January 2023); CMS Doctors and Clinicians.
Enrolled in Medicare (PECOS)
Dr. Tomaszewski has a Medicare enrollment record in PECOS, the CMS system clinicians use to enroll so they can bill Medicare or order services for people with Medicare.
It does not show whether the clinician accepts assignment, is in your plan's network, or is taking new patients.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Can order Medicare-covered services
CMS lists Dr. Tomaszewski as eligible to order or refer Medicare Part B clinical laboratory and imaging services, durable medical equipment (DME) and home health services for people with Medicare.
Medicare pays for these items and services only when they are ordered by an eligible clinician.
What this does not show: Can order Medicare-covered services
It does not mean the clinician offers these services directly.
Source: CMS Medicare Fee-For-Service Public Provider Enrollment (PECOS); CMS Order and Referring file.
Compared with the same specialty in Buffalo and New York
Billing and prescribing volume is not a quality rating.
Medicare Part B services
Fewer Medicare Part B services than 65% of clinicians listed under Pathology - Anatomic Pathology in Buffalo, NY (2024, 13 clinicians with data). Median for this group: 693. Middle half: 196 to 1,010.
Fewer Medicare Part B services than 80% of clinicians listed under Pathology - Anatomic Pathology in New York (2024, 187 clinicians with data). Median for this group: 1,195. Middle half: 558 to 2,151.
Medicare-allowed amount
A lower Medicare-allowed amount than 75% of clinicians listed under Pathology - Anatomic Pathology in Buffalo, NY (2024, 13 clinicians with data). Median for this group: $30,135. Middle half: $9,229 to $40,091.
A lower Medicare-allowed amount than 85% of clinicians listed under Pathology - Anatomic Pathology in New York (2024, 187 clinicians with data). Median for this group: $57,512. Middle half: $24,254 to $95,076.
Paid by Medicare
A lower Medicare payment amount than 75% of clinicians listed under Pathology - Anatomic Pathology in Buffalo, NY (2024, 13 clinicians with data). Median for this group: $21,697. Middle half: $7,258 to $31,942.
A lower Medicare payment amount than 85% of clinicians listed under Pathology - Anatomic Pathology in New York (2024, 187 clinicians with data). Median for this group: $44,954. Middle half: $19,324 to $75,434.
19 active clinicians are listed under Pathology - Anatomic Pathology with a practice address in Buffalo, NY (374 in New York).
Addresses are self-reported to NPPES and may be out of date.
Telehealth indicator in Buffalo
0% of these 19 clinicians have the CMS telehealth indicator.
84.2% of these 19 clinicians are listed by CMS as accepting Medicare assignment.
CMS data by year
Changes may reflect reporting, coverage or privacy limits, not changes in care quality.
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Medicare Part B services
Medicare Part B services increased 122% from 165 in 2019 to 366 in 2024.
- 2019: 165
- 2023: 168
- 2024: 366
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Medicare-allowed amount
Medicare-allowed amount increased 113% from $4,334 in 2019 to $9,229 in 2024.
- 2019: $4,334
- 2023: $4,187
- 2024: $9,229
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Paid by Medicare
Paid by Medicare increased 110% from $3,453 in 2019 to $7,258 in 2024.
- 2019: $3,453
- 2023: $3,305
- 2024: $7,258
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Industry payments (Open Payments)
Industry payments (Open Payments) went from $13.35 in 2019 to $108.26 in 2020.
- 2019: $13.35
- 2020: $108.26
Sources: CMS Medicare Physician & Other Practitioners (2024), CMS Open Payments (2020), CMS Doctors and Clinicians, CMS NPPES NPI Registry. Specialty names follow the NUCC Health Care Provider Taxonomy.
Text: T-MedInfo · Report an error.
Pharma & Medical Device Financial Disclosures
Payments and other transfers of value that drug and medical device companies reported to CMS Open Payments
Program year 2020 (payments made January 1 – December 31, 2020): fewer than 11 records totaling $108.26.
| Manufacturer | Payment Nature | Product | Type | Amount ($) |
|---|---|---|---|---|
| Beckman Coulter, Inc. |
Food and Beverage
In-kind items and services
|
— | General | $108.26 |
Source: CMS Open Payments, program year 2020, released June 30, 2026.
Performed Procedures & Service Volume
CPT® is a registered trademark of the American Medical Association. CPT codes, descriptions and other data only are copyright 2018–2023 American Medical Association. All rights reserved. Applicable FARS/HHSARS apply. Descriptions of CPT codes are the AMA's CPT Consumer Friendly Descriptors as published by CMS in the Medicare Physician & Other Practitioners – by Provider and Service data, 2019–2024; they are plain-language summaries, not for clinical coding or documentation. HCPCS Level II codes and descriptions are from CMS. Fee schedules, relative value units, conversion factors and/or related components are not assigned by the AMA, are not part of CPT, and the AMA is not recommending their use. The AMA does not directly or indirectly practice medicine or dispense medical services. The AMA assumes no liability for data contained or not contained herein.
| HCPCS Code | Services | Patients | Submitted Charge | Medicare Allowed |
|---|---|---|---|---|
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88350
Antibody evaluation, each additional single antibody stain procedure
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162 | 24 | $40.00 | $25.71 |
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88313
Special stained specimen slides to examine tissue including interpretation and report
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83 | 22 | $16.00 | $10.67 |
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88341
Special stained specimen slides to examine tissue, each additional procedure
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33 | 13 | $35.00 | $24.74 |
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88305
Pathology examination of tissue using a microscope, intermediate complexity
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27 | 24 | $55.00 | $33.07 |
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88346
Antibody evaluation, initial single antibody stain procedure
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25 | 22 | $51.00 | $31.88 |
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88342
Special stained specimen slides to examine tissue, initial procedure
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21 | 19 | $50.00 | $30.91 |
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88348
Electron microscopy for diagnosis
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15 | 14 | $89.00 | $68.19 |
Source: CMS Part B by Provider and Service, 2024; services under 11 beneficiaries omitted by CMS. Privacy limits
Submitted charges are billed amounts, not a price quote for your visit.
Specialties & License Numbers Reported to NPPES
NUCC Taxonomy Code: 207ZP0101X
A pathologist deals with the causes and nature of disease and contributes to diagnosis, prognosis and treatment through knowledge gained by the laboratory application of the biologic, chemical and physical sciences. A pathologist uses information gathered from the microscopic examination of tissue specimens, cells and body fluids, and from clinical laboratory tests on body fluids and secretions for the diagnosis, exclusion and monitoring of disease.
Additional State Medicaid & Healthcare Payer Identifiers
Medicare (PECOS) Enrollment & Ordering Eligibility
Source: CMS PECOSPRACTITIONER - PATHOLOGY
I20120210000301
NY
8820009509
Sources: CMS Provider Enrollment and Order and Referring. Medicare enrollment is a billing status, not an accreditation or quality rating.
Medicare Group Practice Enrollments
Source: CMS Doctors and Clinicians National Downloadable File
University At Buffalo Pathologists Inc
1540 Maple Rd, Williamsville, NY 142213647
Phone: 7165683600
University At Buffalo Pathologists Inc
462 Grider St, Buffalo, NY 142153021
Phone: 7168983000
University At Buffalo Pathologists Inc
115 Flint Rd, Williamsville, NY 142213058
Phone: 7166267200
University At Buffalo Pathologists Inc
100 High St, Buffalo, NY 142031126
Phone: 7168595600
Clinicians Sharing This Practice Address or Phone
Clinicians sharing this NPPES address, phone or fax; a shared contact does not mean they work together.
Nurse Practitioner
Doctor of Nursing Practice
Nurse Practitioner - Family
Family Nurse Practitioner
Nurse Practitioner
Nurse Practitioner
Emergency Medicine
Doctor of Medicine (M.D.)
Psychiatry & Neurology - Neurology
Doctor of Medicine (M.D.)
Student in an Organized Health Care Education/Training Program
Career & Practice History
NPI enumerated June 22, 2006.
No changes to the name, practice address, taxonomy or NPI status in this record have been observed in the monthly NPPES data files from January 2017 to August 2026.
NPI Administrative Meta
Other Pathology - Anatomic Pathology Specialists in Buffalo
- Dr. Maurice Barcos, MD
- Dr. Saraswati Pokharel, MD
- Dr. Carl Morrison, MD
- Jinrong Cheng
- Dr. Norbert Sule, MD PHD
- Dr. Bora Baysal, MD PHD
Mailing Address
100 High St
Buffalo, NY 142031126
Phone: 7168595600