Ian Greenberg, MD
Gastroenterology · Dallas, TXNPI 1649791542
Payments from drug & device makers
Across 81 payments — averaging $81.23 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Boston Scientific$2K
- AbbVie$1K
- Wilson Cook Medical Incorporated$757
- ERBE USA Inc$470
- E.r. Squibb & Sons, L.L.C.$338
- Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$257
- plus $1K from 12 others
What the payments were for
- Travel & lodging$2,11632%
- Food & beverage$4,46468%
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 |
|---|---|---|
| Boston Scientific | 25 | $2,198 |
| AbbVie | 21 | $1,231 |
| Wilson Cook Medical Incorporated | 3 | $757 |
| ERBE USA Inc | 5 | $470 |
| E.r. Squibb & Sons, L.L.C. | 3 | $338 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 5 | $257 |
| Gilead | 3 | $242 |
| Intercept Pharmaceuticals, Inc. | 2 | $230 |
| Cook Medical LLC | 3 | $178 |
| Olympus America Inc. | 1 | $145 |
| Ardelyx, Inc. | 1 | $111 |
| Apollo Endosurgery US Inc | 3 | $111 |
| Regeneron Healthcare Solutions, Inc. | 1 | $101 |
| Fujifilm Healthcare Americas Corporation | 1 | $75 |
| Pentax Of America, Inc. | 1 | $75 |
| Laborie Medical Technologies Corp. | 1 | $23 |
| Takeda Pharmaceuticals U.S.A., Inc. | 1 | $21 |
| Bristol Myers Squibb | 1 | $17 |
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.
- APOLLO ESG System$1,020
- FUSION$757
- Rinvoq$343
- ZEPOSIA$241
- OCALIVA$230
- VIO300D$152
- APC2$152
- VIO 300D$150
- Hemospray$147
- Resolution 360 Clip$145
- EndoClot PHS$145
- Mavyret$124
- XIFAXAN$120
- GENERAL - THERAPIES$119
- VIO3$116
- IBSRELA$111
- RADIAL JAW 4$111
- RELISTOR$109
- DUPIXENT$101
How this compares
$6,580 in reported general payments places this provider in the 60th percentile of 1,350 gastroenterology providers in Texas.
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 gastroenterology in Dallas
- John FordtranDallas$9.9M
- Parvez MantryDallas$6.4M
- Michael BrownDallas$5.5M
- Jacqueline O LearyDallas$1.4M
- Themistocles DassopoulosDallas$1.1M
- Moheb BoktorDallas$1M
- Lisa VanwagnerDallas$486K
- Rodney InfanteDallas$442K
- Eric LawitzSan Antonio$59.5M
- George DuvallTyler$17.5M
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.