Karthi Namasivayam
Psychiatry · Knoxville, TNNPI 1437145448
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $177,894 of the $225,424 with a category attached, or 78.9%. Alkermes, Inc. accounts for 71.0% of it on its own, with 12 other manufacturers making up the rest. Among psychiatry 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 381 payments — averaging $591.66 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Alkermes, Inc.$160K
- E.r. Squibb & Sons, L.L.C.$34K
- Otsuka America Pharmaceutical, Inc.$17K
- Otsuka Pharmaceutical Development & Commercialization, Inc.$6K
- AbbVie$5K
- Johnson & Johnson$4K
- plus $501 from 7 others
What the payments were for
- Consulting fees$15,4307%
- Speaking & faculty fees$177,89479%
- Travel & lodging$23,30310%
- Food & beverage$8,7714%
- Education$260%
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 |
|---|---|---|
| Alkermes, Inc. | 233 | $160,030 |
| E.r. Squibb & Sons, L.L.C. | 55 | $33,906 |
| Otsuka America Pharmaceutical, Inc. | 43 | $16,564 |
| Otsuka Pharmaceutical Development & Commercialization, Inc. | 13 | $5,986 |
| AbbVie(2 entities) | 10 | $4,816 |
| Johnson & Johnson | 16 | $3,621 |
| Sunovion Pharmaceuticals Inc. | 1 | $122 |
| Indivior Inc. | 4 | $107 |
| USWM, LLC | 2 | $68 |
| Teva Pharmaceuticals USA, Inc. | 1 | $66 |
| Idorsia Pharmaceuticals US Inc | 1 | $59 |
| Axsome Therapeutics, Inc. | 1 | $55 |
| Acadia Pharmaceuticals Inc | 1 | $24 |
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.
- ARISTADA$361,275
- LYBALVI$272,497
- ARISTADA INITIO$81,282
- COBENFY$25,691
- ABILIFY MAINTENA$15,866
- VRAYLAR$4,524
- SPRAVATO$3,264
- REXULTI$647
- VIIBRYD$200
- LATUDA$122
How this compares
$225,424 in reported general payments places this provider in the 95th percentile of 503 psychiatry providers in Tennessee.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| CaplytaLumateperone Tosylate | 16 | $33,540 |
| AuvelityDextromethorphan Hbr/Bupropion | 17 | $17,148 |
| Aripiprazole | 106 | $3,979 |
| Lurasidone Hcl | 56 | $3,941 |
| Bupropion XlBupropion Hcl | 117 | $1,699 |
| Buspirone Hcl | 56 | $1,636 |
| Atomoxetine Hcl | 21 | $1,595 |
| Duloxetine Hcl | 82 | $1,404 |
| Mirtazapine | 53 | $985 |
| Quetiapine Fumarate | 69 | $969 |
| Olanzapine | 58 | $930 |
| Hydroxyzine Hcl | 56 | $924 |
| Oxcarbazepine | 18 | $813 |
| Trazodone Hcl | 65 | $719 |
| Lamotrigine | 43 | $486 |
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 |
|---|---|---|
| Axsome Therapeutics, Inc.Auvelity | $55 | $17,14817 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 503 psychiatry providers in Tennessee.
Other psychiatry in Knoxville
- Lane CookKnoxville$53K
- Kelley WalkerKnoxville$17K
- Sharon BurnsideKnoxville$16K
- James KennedyKnoxville$15K
- Bryan WestKnoxville$15K
- Kris HouserKnoxville$14K
- Charles MayKnoxville$9K
- Julia WoodKnoxville$6K
- James RigellKnoxville$6K
- Rakesh AminNashville$3M
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.