Oliver Gilliam, MD
Gastroenterology · South Bend, INNPI 1497759765
Payments from drug & device makers
Across 347 payments — averaging $15.64 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$1K
- Gilead$663
- Takeda Pharmaceuticals U.S.A., Inc.$624
- Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$517
- Johnson & Johnson$514
- Ironwood Pharmaceuticals, Inc$193
- plus $1K from 26 others
What the payments were for
- Food & beverage$5,422100%
- Education$50%
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 |
|---|---|---|
| AbbVie | 100 | $1,500 |
| Gilead | 51 | $663 |
| Takeda Pharmaceuticals U.S.A., Inc. | 35 | $624 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 34 | $517 |
| Johnson & Johnson | 35 | $514 |
| Ironwood Pharmaceuticals, Inc | 14 | $193 |
| Amgen | 6 | $155 |
| Braintree Laboratories, Inc. | 9 | $154 |
| Pfizer | 8 | $134 |
| Bristol Myers Squibb | 8 | $118 |
| Merck | 6 | $100 |
| Covidien LP | 1 | $97 |
| Sanofi | 4 | $68 |
| Intercept Pharmaceuticals, Inc. | 4 | $61 |
| Shionogi Inc | 4 | $57 |
| Mauna Kea Technologies, Inc. | 6 | $57 |
| Regeneron Healthcare Solutions, Inc. | 2 | $44 |
| UCB, Inc. | 2 | $43 |
| Boston Scientific | 2 | $40 |
| Intuitive Surgical | 1 | $40 |
| Vivus LLC | 2 | $35 |
| Nestle Healthcare Nutrition Inc. | 2 | $33 |
| Alfasigma USA, Inc. | 2 | $29 |
| Medtronic | 1 | $21 |
| Dova Pharmaceuticals | 1 | $20 |
| Micro-tech Endoscopy USA, Inc. | 1 | $19 |
| Ferring Pharmaceuticals Inc. | 1 | $16 |
| Daiichi Sankyo Inc. | 1 | $15 |
| Alnylam Pharmaceuticals Inc. | 1 | $15 |
| QOL Medical, LLC | 1 | $15 |
| Endo Pharmaceuticals Inc. | 1 | $15 |
| Boehringer Ingelheim | 1 | $14 |
How this compares
$5,427 in reported general payments places this provider in the 65th percentile of 323 gastroenterology providers in Indiana.
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 |
|---|---|---|
| Sod Sulf-Potass Sulf-Mag SulfSodium, Potassium,mag Sulfates | 78 | $4,983 |
| Peg 3350-ElectrolyteSodium Chloride/Nahco3/Kcl/Peg | 35 | $768 |
| Gavilyte-GPeg3350/Sod Sulf,bicarb,cl/Kcl | 33 | $363 |
| Pantoprazole Sodium | 33 | $333 |
| Peg-3350 And ElectrolytesPeg3350/Sod Sulf,bicarb,cl/Kcl | 12 | $169 |
Paid to pharmacies, not to this prescriber.
Other gastroenterology in South Bend
- Pankaj PatelSouth Bend$2.3M
- Ravi PatelSouth Bend$183K
- John MathisSouth Bend$16K
- Monika FischerIndianapolis$2.8M
- Douglas RexIndianapolis$2.3M
- David PoundIndianapolis$1.4M
- Naga ChalasaniIndianapolis$1.1M
- Sashidhar SagiWestfield$1.1M
- Jonathan ObertNew Albany$758K
- David DresnerNew Albany$544K
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.