Daniel Claassen, MD
Neurology · Nashville, TNNPI 1821101411
Payments from drug & device makers
Across 520 payments — averaging $6723.40 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Genentech, Inc.$2.1M
- AbbVie$977K
- Neurocrine Biosciences, Inc.$148K
- PTC Therapeutics, Inc.$127K
- Teva Pharmaceuticals USA, Inc.$84K
- Lundbeck LLC$24K
- plus $70K from 12 others
Across 23 payments — averaging $1142.02 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.
- Teva Pharmaceuticals USA, Inc.$26K
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 |
|---|---|---|
| Genentech, Inc. | 65 | $2,066,241 |
| AbbVie | 123 | $977,376 |
| Neurocrine Biosciences, Inc. | 87 | $147,804 |
| PTC Therapeutics, Inc. | 29 | $126,604 |
| Teva Pharmaceuticals USA, Inc. | 115 | $84,362 |
| Lundbeck LLC | 21 | $23,950 |
| Spark Therapeutics, Inc. | 11 | $23,926 |
| Biogen | 1 | $16,770 |
| Novartis | 6 | $10,596 |
| Acadia Pharmaceuticals Inc | 40 | $6,158 |
| H. Lundbeck A S | 4 | $5,680 |
| F. Hoffmann-la Roche AG | 3 | $4,036 |
| Vertical Pharmaceuticals, LLC | 1 | $1,160 |
| Sage Therapeutics, LLC | 2 | $1,062 |
| Catalyst Pharmaceuticals, Inc. | 4 | $201 |
| Kyowa Kirin, Inc. | 3 | $107 |
| Adamas Pharmaceuticals, Inc. | 2 | $66 |
| Alnylam Pharmaceuticals Inc. | 3 | $66 |
How this compares
$3,496,166 in reported general payments places this provider in the 95th percentile of 361 neurology providers in Tennessee.
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 neurology in Nashville
- Siddharama PawateNashville$2M
- John FangNashville$1.5M
- Lealani AcostaNashville$1.4M
- Amy BrownNashville$895K
- Katherine McDonellNashville$862K
- Harold MosesNashville$778K
- Philip CharlesNashville$700K
- Shilpi MittalNashville$481K
- Francesca BagnatoNashville$378K
- Andrew GiritharanNashville$374K
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.