Vassiliki Boussiotis, MD
Hematology & Oncology · Boston, MANPI 1861474215
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $12,005 of the $12,005 with a category attached, or 100.0%. Every reported general payment came from a single manufacturer, EMD Serono, Inc..
Across 2 payments — averaging $6002.48 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- EMD Serono, Inc.$12K
Across 4 payments — averaging $68,750 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.
- EMD Serono, Inc.$275K
What the payments were for
- Consulting fees$12,005100%
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 |
|---|---|---|
| EMD Serono, Inc. | 2 | $12,005 |
How this compares
$12,005 in reported general payments places this provider in the 70th percentile of 374 hematology & oncology 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 hematology & oncology in Boston
- David ScaddenBoston$2.6M
- Sara TolaneyBoston$799K
- Matthew DavidsBoston$693K
- Julio HajdenbergBoston$583K
- Paul RichardsonBoston$523K
- Seth WanderBoston$464K
- Corey CutlerBoston$454K
- Hanny Al-SamkariBoston$412K
- Rupal BhattBoston$380K
- Matthew Vander HeidenBoston$355K
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.