Robert Holbrook, MD
Gastroenterology · Norman, OKNPI 1053352054
Payments from drug & device makers
Across 844 payments — averaging $58.60 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Adare Pharmaceuticals, Inc.$38K
- AbbVie$3K
- Takeda Pharmaceuticals U.S.A., Inc.$2K
- Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$1K
- Johnson & Johnson$1K
- Bristol Myers Squibb$684
- plus $4K from 27 others
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 |
|---|---|---|
| Adare Pharmaceuticals, Inc. | 31 | $37,545 |
| AbbVie | 236 | $3,475 |
| Takeda Pharmaceuticals U.S.A., Inc. | 115 | $1,575 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 122 | $1,438 |
| Johnson & Johnson | 73 | $1,030 |
| Bristol Myers Squibb | 52 | $684 |
| Gilead | 29 | $412 |
| Ironwood Pharmaceuticals, Inc | 35 | $377 |
| QOL Medical, LLC | 18 | $339 |
| Daiichi Sankyo Inc. | 16 | $268 |
| Sanofi | 15 | $226 |
| Steris Corporation | 2 | $220 |
| Pfizer | 11 | $201 |
| Nestle Healthcare Nutrition Inc. | 11 | $195 |
| Medtronic | 3 | $189 |
| Regeneron Healthcare Solutions, Inc. | 9 | $168 |
| Ferring Pharmaceuticals Inc. | 8 | $154 |
| Merck | 9 | $135 |
| Aimmune Therapeutics, Inc. | 7 | $128 |
| Braintree Laboratories, Inc. | 7 | $99 |
| Madrigal Pharmaceuticals | 4 | $94 |
| Ardelyx, Inc. | 6 | $93 |
| Intercept Pharmaceuticals, Inc. | 5 | $87 |
| Lilly USA, LLC | 4 | $86 |
| Olympus America Inc. | 5 | $77 |
| Phathom Pharmaceuticals, Inc. | 2 | $31 |
| Redhill Biopharma Inc. | 2 | $28 |
| UCB, Inc. | 2 | $27 |
| Mallinckrodt Hospital Products Inc. | 1 | $17 |
| Ipsen Biopharmaceuticals, Inc | 1 | $16 |
| AMAG Pharmaceuticals, Inc. | 1 | $16 |
| Organon | 1 | $12 |
| Cook Medical LLC | 1 | $12 |
How this compares
$49,454 in reported general payments places this provider in the 85th percentile of 133 gastroenterology providers in Oklahoma.
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 Norman
- Andrew BlackNorman$21K
- Joshua WhortonNorman$16K
- Chintan ParikhNorman$11K
- Blair KirkpatrickNorman$11K
- Charles LackeyNorman$9K
- Philip BirdNorman$9K
- Harvey TatumTulsa$2.6M
- Tauseef AliOklahoma City$2.1M
- David StokesberryOklahoma City$1.7M
- George SalemOklahoma City$1.2M
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.