Daniel Claassen, MD
Neurology · Nashville, TNNPI 1821101411
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $203,391 of the $284,999 with a category attached, or 71.4%. 16 manufacturers reported payments, led by Teva Pharmaceuticals USA, Inc. at 29.6% of the total. Among neurology 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 342 payments — averaging $833.33 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Teva Pharmaceuticals USA, Inc.$84K
- Neurocrine Biosciences, Inc.$71K
- PTC Therapeutics, Inc.$32K
- Lundbeck LLC$24K
- Spark Therapeutics, Inc.$24K
- AbbVie$21K
- plus $29K from 10 others
Across 201 payments — averaging $16,107 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.
- Genentech, Inc.$2.1M
- AbbVie$956K
- PTC Therapeutics, Inc.$95K
- Neurocrine Biosciences, Inc.$77K
- Teva Pharmaceuticals USA, Inc.$26K
- Biogen$17K
What the payments were for
- Consulting fees$203,39171%
- Speaking & faculty fees$38,91314%
- Travel & lodging$34,45712%
- Food & beverage$8,0153%
- Education$2230%
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 |
|---|---|---|
| Teva Pharmaceuticals USA, Inc. | 115 | $84,362 |
| Neurocrine Biosciences, Inc. | 78 | $70,678 |
| PTC Therapeutics, Inc. | 22 | $31,883 |
| Lundbeck LLC | 21 | $23,950 |
| Spark Therapeutics, Inc. | 11 | $23,926 |
| AbbVie | 27 | $21,067 |
| 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 |
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.
- AUSTEDO$48,709
- INGREZZA$30,870
- Austedo XR$28,866
- NORTHERA$23,767
- NUPLAZID$5,499
- BOTOX$4,495
- OSMOLEX ER$1,160
- Non-Covered Product$830
- VYALEV$800
- FIRDAPSE$102
How this compares
$284,999 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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| AustedoDeutetrabenazine | 19 | $214,243 |
| Austedo XrDeutetrabenazine | 30 | $155,485 |
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 |
|---|---|---|
| Teva Pharmaceuticals USA, Inc.Austedo, Austedo Xr | $84,362 | $369,72849 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 361 neurology providers in Tennessee.
Other neurology in Nashville
- Harold MosesNashville$438K
- Francesca BagnatoNashville$167K
- Philip CharlesNashville$132K
- Benjamin HoffmanNashville$124K
- Joy DerwenskusNashville$107K
- James EatonNashville$85K
- Elizabeth FerlugaNashville$77K
- Britt StoneNashville$75K
- Lavanya NagineniNashville$43K
- Amy BrownNashville$42K
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.