John J. Callahan, MD
NPI 1952338048ActiveIndividual· Orthopaedic Surgery, Hand Surgery· Amherst, NY
Orthopaedic Surgery, Hand Surgery (MD) in Amherst, New York, trained at State University of Ny Upstate Medical University (class of 1987). 275 Medicare patients in 2024, $83,559 paid; nearly all of their 166 Part D prescriptions were generic (98%). Integra Lifesciences Corporation was the largest of 4 companies reporting payments in 2025, $361.56 in all, mostly food and beverage.
Overview
| NPI | 1952338048 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 26, 2006 |
| Last updated in NPPES | Dec 31, 2009 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Orthopaedic Surgery, Hand Surgery Primary | 207XS0106X | 192324 | 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 - Orthopedic Surgery (NY) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 275 |
|---|---|
| Services billed | 1,313 across 67 procedure codes |
| Paid by Medicare | $83,559 |
Part D prescriptions in 2024
| Prescriptions (claims) | 166 · 169 30-day fills |
|---|---|
| Patients | 113 |
| Total drug cost | $1,176 |
| Generic share | 98% of claims |
Education and affiliations
| Medical school | State University of Ny Upstate Medical University |
|---|---|
| Graduation year | 1987 |
| Medicare specialty | Orthopedic Surgery |
| Secondary specialties | Hand Surgery |
Medical group
- Excelsior Orthopaedics LLPAmherst, NY · 144 clinicians
Hospital affiliations
- Erie County Medical CenterBuffalo, NY
- Mercy Hospital of BuffaloBuffalo, NY
Industry payments (Open Payments)
- 2025$361.56 · 7 payments from 4 companies
- 2024$189.66 · 3 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Integra Lifesciences Corporation | $170.86 | 1 |
| Prodigy Surgical Distribution, Inc. | $84.58 | 1 |
| Amgen Inc. | $56.90 | 3 |
| Endo USA, Inc. | $49.22 | 2 |
What the 2025 payments were for
- Food and Beverage$190.70 · 6 payments
- Long term medical supply or device loan$170.86 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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