Charles Cassidy, MD
Hand Surgery · Boston, MANPI 1053351585
Payments from drug & device makers
What this record shows
The money is spread across several categories — speaking fees (46.9%), education and travel and lodging — rather than concentrated in one kind of arrangement. Synthes GmbH accounts for 68.3% of it on its own, with 10 other manufacturers making up the rest. Reporting peaked in 2023 at $12,828 and has fallen 71.7% since, to $3,625 in 2025. Among hand surgery clinicians in MA with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 68 payments — averaging $652.71 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Synthes GmbH$30K
- Skeletal Dynamics Inc$12K
- Kairos Surgical Inc$1K
- Stryker$500
- Smith+Nephew$309
- Endo Pharmaceuticals Inc.$75
- plus $162 from 5 others
What the payments were for
- Consulting fees$2,5006%
- Speaking & faculty fees$20,82547%
- Travel & lodging$8,93520%
- Food & beverage$1,2503%
- Education$10,87525%
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 |
|---|---|---|
| Synthes GmbH | 40 | $30,300 |
| Skeletal Dynamics Inc | 6 | $11,823 |
| Kairos Surgical Inc | 2 | $1,216 |
| Stryker | 4 | $500 |
| Smith+Nephew | 9 | $309 |
| Endo Pharmaceuticals Inc. | 1 | $75 |
| Zimmer Biomet | 1 | $49 |
| Aroa Biosurgery Incorporated | 1 | $42 |
| Orthofix Medical, Inc. | 2 | $29 |
| Acera Surgical, Inc. | 1 | $24 |
| Endo USA, Inc. | 1 | $17 |
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.
How this compares
$44,384 in reported general payments places this provider in the 90th percentile of 68 hand surgery providers in Massachusetts.
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.
Other hand surgery in Boston
- George DyerBoston$362K
- Branden EarpBoston$74K
- Chaitanya MudgalBoston$46K
- Philip BlazarBoston$21K
- Monica ShojiBoston$13K
- Benjamin GundlachBoston$11K
- Nicholas GolinvauxBoston$9K
- Giscard AdeclatBoston$7K
- Manish MehtaBoston$6K
- Kevin ZuoBoston$6K
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.