Allan Chastain
Adult Medicine · Cleveland, TNNPI 1508877341
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 234 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. It is spread thinly across 31 manufacturers, the largest accounting for just 19.6% — the pattern of someone who eats at a lot of different presentations. Reporting peaked in 2021 at $1,556 and has fallen 95.8% since, to $66 in 2025.
Across 234 payments — averaging $17.60 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AstraZeneca$806
- Novo Nordisk$630
- AbbVie$507
- Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$286
- Biohaven Pharmaceuticals, Inc.$243
- Boehringer Ingelheim$207
- plus $1K from 25 others
What the payments were for
- Food & beverage$4,118100%
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 | 36 | $806 |
| Novo Nordisk | 42 | $630 |
| AbbVie(2 entities) | 21 | $507 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 12 | $286 |
| Biohaven Pharmaceuticals, Inc. | 6 | $243 |
| Boehringer Ingelheim | 14 | $207 |
| Pfizer | 22 | $197 |
| Amarin Pharma, Inc. | 9 | $156 |
| Lilly USA, LLC | 11 | $156 |
| Sanofi-aventis U.S. LLC | 10 | $154 |
| Merck | 8 | $112 |
| Takeda Pharmaceuticals U.S.A., Inc. | 7 | $107 |
| Johnson & Johnson | 7 | $98 |
| GSK | 5 | $81 |
| Kowa Pharmaceuticals America, Inc. | 4 | $55 |
| Bayer | 2 | $38 |
| Astellas Pharma US Inc | 2 | $34 |
| Amgen | 2 | $29 |
| Esperion Therapeutics, Inc. | 2 | $29 |
| Abbott | 1 | $20 |
| Otsuka America Pharmaceutical, Inc. | 1 | $20 |
| Lundbeck LLC | 1 | $19 |
| Biohaven Pharmaceutical Holding Company Ltd. | 1 | $17 |
| Novartis | 1 | $16 |
| Genentech USA, Inc. | 1 | $16 |
| Eisai Inc. | 1 | $16 |
| Arbor Pharmaceuticals, Inc. | 1 | $15 |
| Supernus Pharmaceuticals, Inc. | 1 | $15 |
| Dexcom, Inc. | 1 | $14 |
| Aytu Biopharma, Inc. | 1 | $13 |
| E.r. Squibb & Sons, L.L.C. | 1 | $12 |
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.
- VRAYLAR$125
- UBRELVY$125
- BREZTRI AEROSPHERE$125
- FARXIGA$115
- XIFAXAN$110
How this compares
$4,118 in reported general payments places this provider in the 75th percentile of 22 adult medicine providers in Tennessee.
Other adult medicine in Cleveland
- Paul BoeremaCleveland$11K
- Dennis ThompsonCleveland$10K
- William HaysCleveland$10K
- Michael KelloggGallatin$19K
- Cynthia ShafferOoltewah$5K
- John LeeMurfreesboro$4K
- Bojidar DolaptchievNewport$2K
- John SherrillBristol$1K
- Jung ParkDunlap$889
- Jill WallnerCrossville$686
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.