Farshid Dayyani
Medical Oncology · Orange, CANPI 1376710434
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $856,178 of the $1,155,510 with a category attached, or 74.1%. It is spread thinly across 24 manufacturers, the largest accounting for just 23.0%. Among medical oncology clinicians in CA 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 975 payments — averaging $1185.14 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Sirtex Medical Inc$266K
- Takeda Pharmaceuticals U.S.A., Inc.$224K
- Astellas Pharma US Inc$158K
- Exelixis Inc.$125K
- Ipsen Biopharmaceuticals, Inc$102K
- Eisai Inc.$81K
- plus $199K from 18 others
Across 612 payments — averaging $19,970 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.
- AstraZeneca$3.3M
- Exelixis Inc.$1.4M
- Amgen$1.1M
- E.r. Squibb & Sons, L.L.C.$1M
- Genentech, Inc.$853K
- Astrazeneca UK Limited$779K
- plus $3.7M from 14 others
What the payments were for
- Consulting fees$162,12414%
- Speaking & faculty fees$856,17874%
- Travel & lodging$116,13010%
- Food & beverage$20,6782%
- Education$4000%
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 |
|---|---|---|
| Sirtex Medical Inc | 296 | $266,045 |
| Takeda Pharmaceuticals U.S.A., Inc. | 118 | $224,213 |
| Astellas Pharma US Inc | 100 | $158,115 |
| Exelixis Inc. | 134 | $125,279 |
| Ipsen Biopharmaceuticals, Inc | 68 | $102,329 |
| Eisai Inc. | 104 | $80,519 |
| AstraZeneca | 40 | $77,119 |
| Beone Medicines USA, Inc. | 23 | $39,966 |
| Amgen | 42 | $27,885 |
| Foundation Medicine, Inc. | 6 | $10,750 |
| Servier Pharmaceuticals LLC | 15 | $8,216 |
| Jazz Pharmaceuticals Inc. | 2 | $7,605 |
| Deciphera Pharmaceuticals Inc. | 7 | $6,071 |
| Astrazeneca UK Limited | 2 | $4,795 |
| Genentech USA, Inc. | 5 | $4,237 |
| Taiho Oncology, Inc. | 2 | $3,284 |
| Beigene USA, Inc. | 1 | $2,000 |
| Daiichi Sankyo Inc. | 1 | $1,875 |
| Ipsen Bioscience Inc. | 3 | $1,720 |
| Genentech, Inc. | 1 | $1,500 |
| Astellas Pharma Europe Ltd | 2 | $1,365 |
| F. Hoffmann-la Roche AG | 1 | $400 |
| AbbVie | 1 | $125 |
| Array Biopharma Inc | 1 | $97 |
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.
- SIR-Spheres Microspheres$256,482
- FRUZAQLA$222,908
- Cabometyx$118,796
- Vyloy$93,058
- ONIVYDE$83,868
- LENVIMA$79,407
- IMFINZI$54,771
- TEVIMBRA$41,711
- Vectibix$26,429
- SOMATULINE DEPOT$21,144
- FOUNDATIONONE LIQUID$10,750
- FOUNDATIONFOCUS$10,750
- FOUNDATIONONE CDX$10,750
- FOUNDATIONONE HEME$10,750
- FOUNDATIONONE$10,750
- ZIIHERA$7,605
- QINLOCK$6,054
- TECENTRIQ$5,958
- LAVA LES (Liquid Embolic System)$5,500
- TIBSOVO$4,329
How this compares
$1,155,510 in reported general payments places this provider in the 95th percentile of 379 medical oncology providers in California.
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 |
|---|---|---|
| LynparzaOlaparib | 18 | $271,701 |
| CreonLipase/Protease/Amylase | 18 | $40,871 |
| Ondansetron Hcl | 68 | $2,266 |
| Imatinib Mesylate | 13 | $1,711 |
| Prochlorperazine Maleate | 89 | $1,038 |
| Clobetasol Propionate | 11 | $535 |
| Olanzapine | 43 | $528 |
| Potassium Chloride | 20 | $526 |
| Diphenoxylate-AtropineDiphenoxylate Hcl/Atropine | 16 | $330 |
| Pantoprazole Sodium | 19 | $263 |
| Ondansetron OdtOndansetron | 13 | $222 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 16 | $218 |
| Dexamethasone | 24 | $207 |
| LoperamideLoperamide Hcl | 12 | $180 |
| Levothyroxine Sodium | 12 | $82 |
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 |
|---|---|---|
| AstraZenecaLynparza | $77,119 | $271,70118 claims |
| AbbVieCreon | $125 | $40,87118 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 379 medical oncology providers in California.
Other medical oncology in Orange
- Susan O BrienOrange$414K
- Jennifer ValerinOrange$188K
- Sayeh LavasaniOrange$162K
- Victoria VillaflorOrange$91K
- Stephen SherwinSan Francisco$6.9M
- Noam DrazinBeverly Hills$1.4M
- April TeitelbaumSan Diego$1.1M
- Przemyslaw TwardowskiSanta Monica$995K
- Ann LowePalo Alto$923K
- Marin XavierSan Diego$919K
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.