John Callahan, MD
Hand Surgery · Amherst, NYNPI 1952338048
Payments from drug & device makers
What this record shows
The money is spread across several categories — food and beverage (46.0%), education and travel and lodging — rather than concentrated in one kind of arrangement. 15 manufacturers reported payments, led by Sonex Health, Inc. at 39.4% of the total. Reporting peaked in 2023 at $1,681 and has fallen 78.5% since, to $362 in 2025.
Across 50 payments — averaging $81.33 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Sonex Health, Inc.$2K
- Prodigy Surgical Distribution, Inc.$1K
- Endo Pharmaceuticals Inc.$329
- Stryker$240
- Skeletal Dynamics Inc$184
- Integra Lifesciences Corporation$171
- plus $455 from 9 others
Across 3 payments — averaging $80,108 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Sonex Health, Inc.$240K
What the payments were for
- Speaking & faculty fees$501%
- Travel & lodging$97724%
- Food & beverage$1,86946%
- Education$1,00025%
- Other$1714%
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| Sonex Health, Inc. | 10 | $1,603 |
| Prodigy Surgical Distribution, Inc. | 3 | $1,085 |
| Endo Pharmaceuticals Inc. | 6 | $329 |
| Stryker | 6 | $240 |
| Skeletal Dynamics Inc | 3 | $184 |
| Integra Lifesciences Corporation | 1 | $171 |
| Amgen(2 entities) | 8 | $141 |
| Abbott | 4 | $89 |
| Axogen | 1 | $51 |
| Trice Medical, Inc. | 1 | $50 |
| Endo USA, Inc. | 2 | $49 |
| Orthofix Medical, Inc. | 2 | $24 |
| Vericel Corporation | 1 | $22 |
| Medtronic | 1 | $16 |
| Lilly USA, LLC | 1 | $13 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
- Sx-One Microknife$1,502
- XIAFLEX$247
- INTEGRA$171
How this compares
$4,066 in reported general payments places this provider in the 60th percentile of 178 hand surgery providers in New York.
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 75 | $313 |
| Methylprednisolone | 15 | $189 |
| Cephalexin | 22 | $114 |
| Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim | 11 | $38 |
Paid to pharmacies, not to this prescriber.
Other hand surgery in Amherst
- Scott WolfeNy$251K
- Nader PaksimaNew York$171K
- Peter SteinGreat Neck$131K
- Michael HausmanNew York$128K
- Otis BarronNew York$122K
- Kevin SetterEast Syracuse$118K
- Nathan EverdingSyracuse$98K
- David TuckmanGreat Neck$96K
- Dan ZlotolowNew York$91K
- Andrew GreenbergGreat Neck$86K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.