Marco da Silva, MD
Hematology & Oncology · Kingsport, TNNPI 1063489649
Payments from drug & device makers
What this record shows
This record is dominated by food and beverage: $344 of the $528 with a category attached, or 65.2%. It is spread thinly across 12 manufacturers, the largest accounting for just 19.2%. Reporting peaked in 2022 at $164 and has fallen 73.6% since, to $43 in 2025. That places this record below the midpoint for hematology & oncology clinicians in TN, where the typical reported total is $5,575.
Across 28 payments — averaging $18.87 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Pfizer$101
- AstraZeneca$100
- Novartis$92
- Merck$43
- Medical Device Business Services, Inc.$28
- Genentech USA, Inc.$27
- plus $137 from 6 others
Across 10 payments — averaging $2526.38 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.
- Genentech, Inc.$25K
What the payments were for
- Food & beverage$34465%
- Education$18435%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
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 |
|---|---|---|
| Pfizer | 7 | $101 |
| AstraZeneca(2 entities) | 3 | $100 |
| Novartis | 4 | $92 |
| Merck | 3 | $43 |
| Medical Device Business Services, Inc. | 2 | $28 |
| Genentech USA, Inc. | 2 | $27 |
| Seagen Inc. | 1 | $26 |
| Clovis Oncology, Inc. | 1 | $26 |
| E.r. Squibb & Sons, L.L.C. | 2 | $26 |
| Johnson & Johnson | 1 | $22 |
| Mirati Therapeutics, Inc. | 1 | $21 |
| Bristol Myers Squibb | 1 | $16 |
How this compares
$528 in reported general payments places this provider in the 15th percentile of 251 hematology & oncology providers in Tennessee.
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 |
|---|---|---|
| Hydroxyurea | 13 | $171 |
| Warfarin Sodium | 23 | $114 |
| Folic Acid | 14 | $50 |
Paid to pharmacies, not to this prescriber.
Other hematology & oncology in Kingsport
- Jonathan AbbasNashville$1.3M
- Alan TanNashville$1.1M
- Kent ShihNashville$900K
- Jason PorterGermantown$756K
- Brian RiniNashville$601K
- Wade IamsNashville$601K
- Krish PatelNashville$531K
- Sandeep RajanNashville$465K
- Todd BauerNashville$357K
- Muhamed BaljevicNashville$313K
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.