Efstathios Papavassiliou, MD
Neurological Surgery · Boston, MANPI 1073551024
Payments from drug & device makers
What this record shows
This record is dominated by travel and lodging: $2,782 of the $3,117 with a category attached, or 89.2%. Medtronic accounts for 90.6% of it on its own, with 5 other manufacturers making up the rest. 2025 is the largest year on record at $2,989, more than ten times the $85 reported in 2023. That places this record below the midpoint for neurological surgery clinicians in MA, where the typical reported total is $3,500.
Across 17 payments — averaging $183.35 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Medtronic$3K
- Johnson & Johnson$149
- Imperative Care, Inc$79
- Integra Lifesciences Corporation$36
- DJO, LLC$16
- Si-bone, Inc.$13
Across 1 payment — averaging $2500.00 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.
- Vertex$3K
What the payments were for
- Travel & lodging$2,78289%
- Food & beverage$33511%
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 |
|---|---|---|
| Medtronic | 7 | $2,824 |
| Johnson & Johnson | 3 | $149 |
| Imperative Care, Inc | 4 | $79 |
| Integra Lifesciences Corporation | 1 | $36 |
| DJO, LLC | 1 | $16 |
| Si-bone, Inc. | 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.
How this compares
$3,117 in reported general payments places this provider in the 45th percentile of 183 neurological 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 neurological surgery in Boston
- Simcha WellerBoston$905K
- Aman PatelBoston$734K
- Alireza AtriBoston$503K
- Myron RolleBoston$290K
- John ChiBoston$280K
- Philipp TausskyBoston$224K
- Robert RichardsonBoston$190K
- Brendon BootBoston$149K
- Muhammad Abd-El-BarrBoston$140K
- Brian NahedBoston$97K
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.