Chad Sisk, DO
Gastroenterology · Guntersville, ALNPI 1922197045
Payments from drug & device makers
Across 93 payments — averaging $29.85 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AstraZeneca$454
- Bayer$379
- Exelixis Inc.$250
- Merck$248
- Taiho Oncology, Inc.$213
- Eisai Inc.$179
- plus $1K from 14 others
What the payments were for
- Food & beverage$2,776100%
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 |
|---|---|---|
| AstraZeneca | 8 | $454 |
| Bayer | 14 | $379 |
| Exelixis Inc. | 2 | $250 |
| Merck | 10 | $248 |
| Taiho Oncology, Inc. | 13 | $213 |
| Eisai Inc. | 4 | $179 |
| Ipsen Biopharmaceuticals, Inc | 3 | $154 |
| Takeda Pharmaceuticals U.S.A., Inc. | 2 | $146 |
| Daiichi Sankyo Inc. | 4 | $146 |
| Astellas Pharma US Inc | 2 | $137 |
| Amgen | 8 | $128 |
| Novartis | 9 | $127 |
| Bristol Myers Squibb | 3 | $48 |
| Ardelyx, Inc. | 2 | $47 |
| Seagen Inc. | 2 | $28 |
| AbbVie(2 entities) | 2 | $26 |
| Regeneron Healthcare Solutions, Inc. | 2 | $26 |
| Novocure Inc. | 1 | $14 |
| Shire North American Group Inc | 1 | $14 |
| Kyowa Kirin, Inc. | 1 | $13 |
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.
How this compares
$2,776 in reported general payments places this provider in the 35th percentile of 225 gastroenterology providers in Alabama.
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 |
|---|---|---|
| MovantikNaloxegol Oxalate | 11 | $4,495 |
| Dicyclomine Hcl | 14 | $452 |
| Gavilyte-CPeg3350/Sod Sulf,bicarb,cl/Kcl | 18 | $296 |
| Pantoprazole Sodium | 21 | $278 |
| Famotidine | 15 | $242 |
| Sucralfate | 17 | $207 |
| Omeprazole | 17 | $167 |
Paid to pharmacies, not to this prescriber.
Other gastroenterology in Guntersville
- Jonathan SiegelMobile$2.6M
- Michael BrownDecatur$1.7M
- Paul LambDothan$1.2M
- Robert ShafferBirmingham$1.2M
- Charles JohnsonMobile$1.2M
- Jack DipalmaMobile$958K
- William McLaughlinDothan$745K
- Charles DasherHomewood$666K
- Samuel TarwaterDothan$664K
- Meagan GrayBirmingham$600K
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.