Nessim Amin, MD
Neurology · Sioux Falls, SDNPI 1316369523
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 99.4% of the total across 49 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 18 manufacturers reported payments, led by AbbVie at 34.8% of the total. Reporting peaked in 2019 at $478 and has fallen 73.9% since, to $125 in 2025.
Across 49 payments — averaging $26.29 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$448
- Greenwich Biosciences, Inc.$140
- Biohaven Pharmaceuticals, Inc.$130
- AstraZeneca$102
- Argenx US, Inc.$93
- Acorda Therapeutics, Inc$70
- plus $306 from 12 others
What the payments were for
- Food & beverage$1,28199%
- Education$81%
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 |
|---|---|---|
| AbbVie(2 entities) | 22 | $448 |
| Greenwich Biosciences, Inc. | 1 | $140 |
| Biohaven Pharmaceuticals, Inc. | 2 | $130 |
| AstraZeneca | 3 | $102 |
| Argenx US, Inc. | 1 | $93 |
| Acorda Therapeutics, Inc | 1 | $70 |
| Novartis | 4 | $50 |
| Eisai Inc. | 2 | $43 |
| EMD Serono, Inc. | 2 | $38 |
| Merz North America, Inc. | 2 | $35 |
| Portola Pharmaceuticals, LLC | 2 | $32 |
| Avion Pharmaceuticals | 1 | $21 |
| SPR Therapeutics, Inc | 1 | $19 |
| Adamas Pharmaceuticals, Inc. | 1 | $17 |
| CSL Behring | 1 | $14 |
| Ipsen Biopharmaceuticals, Inc | 1 | $14 |
| Lundbeck LLC | 1 | $13 |
| Biogen | 1 | $11 |
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.
- Epidiolex$140
- QULIPTA$125
- NURTEC ODT$122
How this compares
$1,288 in reported general payments places this provider in the 65th percentile of 49 neurology providers in South Dakota.
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 |
|---|---|---|
| Levetiracetam | 59 | $1,613 |
| Lacosamide | 21 | $737 |
| Divalproex Sodium | 13 | $319 |
| Oxcarbazepine | 12 | $271 |
| Lamotrigine | 11 | $91 |
Paid to pharmacies, not to this prescriber.
Other neurology in Sioux Falls
- Andrew RidderSioux Falls$97K
- Wijdan RaiSioux Falls$81K
- Jeffrey BoyleSioux Falls$14K
- Mehwish FarooqiSioux Falls$12K
- Bassel SalemSioux Falls$7K
- Cynthia Zevallos MauSioux Falls$6K
- Karan TopiwalaSioux Falls$4K
- Jorge SanchezSioux Falls$3K
- Lisa ViolaSioux Falls$1K
- Xi WangSioux Falls$982
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.