Ardy Davarifar, MD
Hematology & Oncology · Knoxville, TNNPI 1205221603
Payments from drug & device makers
What this record shows
The money is spread across several categories — food and beverage (51.8%), consulting fees and travel and lodging — rather than concentrated in one kind of arrangement. It is spread thinly across 60 manufacturers, the largest accounting for just 24.0%. 2025 is the largest year on record at $9,025, more than ten times the $507 reported in 2022.
Across 425 payments — averaging $40.54 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Regeneron Healthcare Solutions, Inc.$4K
- Mirati Therapeutics, Inc.$2K
- Regeneron$2K
- Deciphera Pharmaceuticals Inc.$1K
- E.r. Squibb & Sons, L.L.C.$803
- Novartis$542
- plus $7K from 54 others
Across 206 payments — averaging $5468.87 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.
- Amgen$270K
- Regeneron$245K
- Biontech SE$177K
- Genmab A/s$160K
- Janssen Research & Development, LLC$128K
- Merck$103K
- plus $44K from 2 others
What the payments were for
- Consulting fees$4,54926%
- Speaking & faculty fees$1,1006%
- Travel & lodging$1,68110%
- Food & beverage$8,92252%
- Education$9786%
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.
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.
- LIBTAYO$3,436
- KRAZATI$1,913
- VIMSELTINIB$1,100
- TheraSphere Y90 Glass Microspheres 10 GBq$132
- Tavalisse$125
How this compares
$17,230 in reported general payments places this provider in the 70th percentile of 251 hematology & oncology 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 |
|---|---|---|
| LenvimaLenvatinib Mesylate | 19 | $422,470 |
| CabometyxCabozantinib S-Malate | 15 | $384,507 |
| NubeqaDarolutamide | 22 | $282,890 |
| ErleadaApalutamide | 18 | $257,476 |
| LonsurfTrifluridine/Tipiracil Hcl | 17 | $190,053 |
| EliquisApixaban | 82 | $74,498 |
| OrgovyxRelugolix | 19 | $49,650 |
| XareltoRivaroxaban | 26 | $15,920 |
| Ondansetron Hcl | 53 | $1,333 |
| Imatinib Mesylate | 13 | $1,088 |
| Olanzapine | 47 | $913 |
| Prochlorperazine Maleate | 42 | $838 |
| Dexamethasone | 41 | $609 |
| Hydroxyurea | 19 | $444 |
| Lidocaine-PrilocaineLidocaine/Prilocaine | 26 | $323 |
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 |
|---|---|---|
| Eisai Inc.Lenvima | $107 | $422,47019 claims |
| Exelixis Inc.Cabometyx | $106 | $384,50715 claims |
| BayerNubeqa | $127 | $282,89022 claims |
| Johnson & JohnsonErleada, Xarelto | $296 | $273,39644 claims |
| Taiho Oncology, Inc.Lonsurf | $28 | $190,05317 claims |
| PfizerEliquis | $350 | $74,49882 claims |
| Lilly USA, LLCOlanzapine | $165 | $91347 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 70th percentile of 251 hematology & oncology providers in Tennessee.
Other hematology & oncology in Knoxville
- Daniel IbachKnoxville$36K
- Ross KernsKnoxville$34K
- Arun KumarKnoxville$31K
- Nathan SchrockKnoxville$28K
- Sudarshan DoddabeleKnoxville$23K
- Jonathan AbbasNashville$1.3M
- Alan TanNashville$1.1M
- Kent ShihNashville$900K
- Jason PorterGermantown$756K
- Brian RiniNashville$601K
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.