Carlton Vollberg
Internal Medicine · Chattanooga, TNNPI 1730178450
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $28,100 of the $30,394 with a category attached, or 92.5%. Amgen accounts for 97.1% of it on its own, with 14 other manufacturers making up the rest. Among internal medicine clinicians in TN with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 104 payments — averaging $292.25 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Amgen$30K
- Amarin Pharma, Inc.$194
- Novartis$174
- AbbVie$98
- Lilly USA, LLC$62
- Antares Pharma, Inc.$54
- plus $289 from 9 others
Across 11 payments — averaging $6747.01 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- Cleerly, Inc.$61K
- AstraZeneca$13K
What the payments were for
- Speaking & faculty fees$28,10092%
- Travel & lodging$8753%
- Food & beverage$1,4195%
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 |
|---|---|---|
| Amgen | 54 | $29,521 |
| Amarin Pharma, Inc. | 13 | $194 |
| Novartis | 8 | $174 |
| AbbVie(2 entities) | 5 | $98 |
| Lilly USA, LLC | 4 | $62 |
| Antares Pharma, Inc. | 4 | $54 |
| Merck | 3 | $50 |
| Merz North America, Inc. | 1 | $48 |
| Eisai Inc. | 3 | $47 |
| Sanofi-aventis U.S. LLC | 3 | $41 |
| Alfasigma USA, Inc. | 2 | $38 |
| Otsuka America Pharmaceutical, Inc. | 1 | $18 |
| Halozyme Inc | 1 | $17 |
| Abbott | 1 | $16 |
| Esperion Therapeutics, Inc. | 1 | $15 |
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
$30,394 in reported general payments places this provider in the 95th percentile of 2,216 internal medicine providers in Tennessee.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Repatha SureclickEvolocumab | 102 | $98,836 |
| MounjaroTirzepatide | 73 | $82,464 |
| JardianceEmpagliflozin | 67 | $55,215 |
| OzempicSemaglutide | 30 | $50,025 |
| TrulicityDulaglutide | 19 | $24,545 |
| EliquisApixaban | 16 | $23,702 |
| Tresiba Flextouch U-100Insulin Degludec | 14 | $10,961 |
| Icosapent Ethyl | 18 | $5,731 |
| SynthroidLevothyroxine Sodium | 19 | $2,163 |
| Rosuvastatin Calcium | 148 | $2,102 |
| Nebivolol Hcl | 13 | $1,617 |
| Ezetimibe | 47 | $1,537 |
| Nateglinide | 19 | $944 |
| Losartan Potassium | 62 | $875 |
| Gabapentin | 39 | $838 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| Lilly USA, LLCMounjaro, Trulicity | $62 | $107,00992 claims |
| AbbVieSynthroid | $98 | $2,16319 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. Against peers, this provider's reported payments sit in the 95th percentile of 2,216 internal medicine providers in Tennessee.
Other internal medicine in Chattanooga
- Maighan SeagroveChattanooga$78K
- Jeremy HogstromChattanooga$30K
- Jermaine HogstromChattanooga$29K
- Eugene RyanChattanooga$26K
- John AndersonNashville$1.5M
- Tracie WalkerJackson$488K
- Nathan TrenthamEtowah$404K
- Dennis DeruelleKnoxville$263K
- Devin ShermanFranklin$191K
- Lewis HagoodKnoxville$143K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.