William Anderson, MD
Gastroenterology · Baton Rouge, LANPI 1598730707
Payments from drug & device makers
Across 83 payments — averaging $17.93 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$841
- Johnson & Johnson$141
- Ipsen Biopharmaceuticals, Inc$111
- Fujifilm Healthcare Americas Corporation$97
- Olympus America Inc.$87
- Gilead$44
- plus $167 from 10 others
What the payments were for
- Food & beverage$1,488100%
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 | 53 | $841 |
| Johnson & Johnson | 10 | $141 |
| Ipsen Biopharmaceuticals, Inc | 4 | $111 |
| Fujifilm Healthcare Americas Corporation | 1 | $97 |
| Olympus America Inc. | 2 | $87 |
| Gilead | 2 | $44 |
| Pfizer | 2 | $27 |
| Aimmune Therapeutics, Inc. | 1 | $26 |
| Pharmacosmos Therapeutics Inc. | 1 | $21 |
| Ardelyx, Inc. | 1 | $16 |
| Bristol Myers Squibb | 1 | $14 |
| Intercept Pharmaceuticals, Inc. | 1 | $14 |
| Ferring Pharmaceuticals Inc. | 1 | $13 |
| Merck | 1 | $12 |
| Boston Scientific | 1 | $12 |
| Amgen | 1 | $12 |
How this compares
$1,488 in reported general payments places this provider in the 25th percentile of 254 gastroenterology providers in Louisiana.
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 | 43 | $2,843 |
| Colestipol Hcl | 12 | $2,253 |
| Omeprazole | 12 | $172 |
| Pantoprazole Sodium | 23 | $119 |
Paid to pharmacies, not to this prescriber.
Other gastroenterology in Baton Rouge
- Gregory GaspardBaton Rouge$4M
- Jonathon ChapmanBaton Rouge$3.6M
- Gia LandryBaton Rouge$511K
- Satyaprasad AlapatiBaton Rouge$317K
- Neelima ReddyBaton Rouge$259K
- Michael BarkerBaton Rouge$167K
- Ronald LeoBaton Rouge$91K
- Christopher ChristensenBaton Rouge$63K
- Humberto AguilarShreveport$13.1M
- Gary ReissMarrero$10M
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.