Apostolos Tsiouris, MD
Diagnostic Radiology · New York, NYNPI 1104830017
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $164,214 of the $164,237 with a category attached, or 100.0%. Merck accounts for 99.4% of it on its own, with 2 other manufacturers making up the rest. Reporting peaked in 2020 at $76,513 and has fallen 100.0% since, to $23 in 2025. Among diagnostic radiology clinicians in NY with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 139 payments — averaging $1181.56 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Merck$163K
- Bristol Myers Squibb$1K
- Abbott$23
What the payments were for
- Consulting fees$164,214100%
- Food & beverage$230%
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 |
|---|---|---|
| Merck | 137 | $163,214 |
| Bristol Myers Squibb | 1 | $1,000 |
| Abbott | 1 | $23 |
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.
- KEYTRUDA$162,201
How this compares
$164,237 in reported general payments places this provider in the 95th percentile of 2,530 diagnostic radiology 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.
Other diagnostic radiology in New York
- Thomas SosNew York$3.5M
- Lawrence TanenbaumNew York$1.5M
- Gregory SicaNew York$496K
- Marc BrownNew York$435K
- Mark WestcottNew York$420K
- Mark FrancesconeNew York$291K
- John CarrinoNew York$276K
- Lawrence SchwartzNew York$269K
- Kambiz NaelNew York$229K
- Bachir TaouliNew York$173K
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.