Mark Silverman, MD
Gastroenterology · Forest Hills, NYNPI 1548227465
Payments from drug & device makers
Across 162 payments — averaging $18.63 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Amarin Pharma, Inc.$375
- Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$366
- AbbVie$325
- GSK$286
- QOL Medical, LLC$282
- Novo Nordisk$136
- plus $1K from 26 others
What the payments were for
- Consulting fees$201%
- Food & beverage$2,96398%
- Education$351%
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 |
|---|---|---|
| Amarin Pharma, Inc. | 24 | $375 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 22 | $366 |
| AbbVie | 17 | $325 |
| GSK | 14 | $286 |
| QOL Medical, LLC | 12 | $282 |
| Novo Nordisk | 8 | $136 |
| Takeda Pharmaceuticals U.S.A., Inc. | 6 | $121 |
| Merck | 6 | $112 |
| Johnson & Johnson(2 entities) | 5 | $105 |
| Braintree Laboratories, Inc. | 5 | $85 |
| Bristol Myers Squibb | 5 | $82 |
| Ferring Pharmaceuticals Inc. | 4 | $78 |
| Daiichi Sankyo Inc. | 3 | $64 |
| Redhill Biopharma Inc. | 3 | $63 |
| Shire North American Group Inc | 3 | $61 |
| Intercept Pharmaceuticals, Inc. | 3 | $59 |
| Pfizer | 2 | $57 |
| AstraZeneca | 3 | $47 |
| Phathom Pharmaceuticals, Inc. | 3 | $45 |
| Alfasigma USA, Inc. | 2 | $37 |
| Glycomark, Inc. | 1 | $31 |
| Dermavant Sciences, Inc. | 1 | $23 |
| Ironwood Pharmaceuticals, Inc | 1 | $22 |
| Alnylam Pharmaceuticals Inc. | 1 | $21 |
| Boehringer Ingelheim | 1 | $20 |
| Exact Sciences | 1 | $19 |
| Celltrion USA Inc. | 1 | $19 |
| Lilly USA, LLC | 1 | $18 |
| Shield Therapeutics Inc | 1 | $17 |
| Intra-sana Laboratories | 1 | $17 |
| Gilead | 1 | $13 |
| Linus Health, Inc. | 1 | $13 |
How this compares
$3,018 in reported general payments places this provider in the 55th percentile of 1,682 gastroenterology 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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| LinzessLinaclotide | 19 | $10,735 |
| OzempicSemaglutide | 12 | $10,279 |
| Sucralfate | 18 | $3,613 |
| ClenpiqSod Picosulf/Mag Ox/Citric Ac | 16 | $2,765 |
| SynthroidLevothyroxine Sodium | 40 | $2,361 |
| Rosuvastatin Calcium | 141 | $1,993 |
| Atorvastatin Calcium | 98 | $1,199 |
| Levothyroxine Sodium | 86 | $1,188 |
| Omeprazole | 65 | $942 |
| Losartan Potassium | 81 | $899 |
| Famotidine | 46 | $893 |
| Pantoprazole Sodium | 77 | $846 |
| Amlodipine Besylate | 86 | $745 |
| Sod Sulf-Potass Sulf-Mag SulfSodium, Potassium,mag Sulfates | 13 | $694 |
| Escitalopram Oxalate | 20 | $687 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| AbbVieLinzess, Synthroid | $325 | $13,09559 claims |
| Novo NordiskOzempic | $136 | $10,27912 claims |
| Ferring Pharmaceuticals Inc.Clenpiq | $78 | $2,76516 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 55th percentile of 1,682 gastroenterology providers in New York.
Other gastroenterology in Forest Hills
- Michael GerdisYonkers$11.9M
- David HudesmanNew York$3.6M
- Ellen ScherlNew York$2.9M
- Igor GrosmanBrooklyn$2.8M
- Bruce SandsNew York$2.8M
- Arun SwaminathNew York$2.7M
- Sonal KumarNew York$2.3M
- David Carr LockeNew York$2.1M
- Arthur KornbluthNew York$1.9M
- Maya SrivastavaWilliamsville$1.8M
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.