Brian Michael Karaszewski, M.D.
NPI 1255478376ActiveIndividual· Internal Medicine· Williamsville, NY
Internal Medicine (M.D.) in Williamsville, New York, trained at State University of New York at Buffalo School of Medicine (class of 1997). Their prescriptions cost Medicare Part D more than their services did: $1,170,703 for 12,640 claims, against $33,826 paid for services in 2024. Abbvie Inc. was the largest of 33 companies reporting payments in 2025, $4,057 in all, mostly food and beverage.
Overview
| NPI | 1255478376 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | Yes |
| NPI issued | Jan 30, 2007 |
| Last updated in NPPES | Aug 19, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 213340-1 | NY |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Internal Medicine (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 194 |
|---|---|
| Services billed | 603 across 34 procedure codes |
| Paid by Medicare | $33,826 |
Part D prescriptions in 2024
| Prescriptions (claims) | 12,640 · 26,675 30-day fills |
|---|---|
| Patients | 1,086 |
| Total drug cost | $1,170,703 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | State University of New York at Buffalo School of Medicine |
|---|---|
| Graduation year | 1997 |
| Medicare specialty | Internal Medicine |
Medical group
- Brain and Spine Medical Services PLLCWilliamsville, NY · 56 clinicians
Hospital affiliations
- Kaleida HealthBuffalo, NY
- Kenmore Mercy HospitalKenmore, NY
- Mount St. Mary's Hospital & Health CenterLewiston, NY
- Sisters of Charity HospitalBuffalo, NY
Other facilities
- McAuley Seton Home Care Corp ChhaHome health agency · Buffalo, NY
- Vna of Western Ny ChhaHome health agency · Cheektowaga, NY
Industry payments (Open Payments)
- 2025$4,057 · 261 payments from 33 companies
- 2024$4,235 · 300 payments from 28 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Abbvie Inc. | $591.02 | 30 |
| Astrazeneca Pharmaceuticals LP | $366.57 | 57 |
| Boehringer Ingelheim Pharmaceuticals, Inc. | $348.04 | 19 |
| Ucb, Inc. | $286.34 | 11 |
| Lilly USA, LLC | $263.12 | 17 |
What the 2025 payments were for
- Food and Beverage$4,057 · 261 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 85 internal medicine physicians in Williamsville · All internal medicine physicians in New York