Paul Koller, MD
Hematology · Duarte, CANPI 1720340169
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $16,851 of the $27,658 with a category attached, or 60.9%. 8 manufacturers reported payments, led by Novartis at 57.4% of the total. Reporting peaked in 2022 at $10,976 and has fallen 98.2% since, to $203 in 2025.
Across 36 payments — averaging $768.28 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Novartis$16K
- Takeda Pharmaceuticals U.S.A., Inc.$8K
- E.r. Squibb & Sons, L.L.C.$2K
- Daiichi Sankyo Inc.$2K
- Sobi, Inc$61
- Amgen$48
- plus $53 from 2 others
Across 29 payments — averaging $90,928 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.
- Novartis$2.5M
- Beigene, Ltd.$68K
- Beone Medicines Ltd.$49K
What the payments were for
- Consulting fees$16,85161%
- Speaking & faculty fees$9,02533%
- Travel & lodging$7093%
- Food & beverage$1,0744%
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 |
|---|---|---|
| Novartis | 18 | $15,864 |
| Takeda Pharmaceuticals U.S.A., Inc. | 6 | $8,031 |
| E.r. Squibb & Sons, L.L.C. | 1 | $2,076 |
| Daiichi Sankyo Inc. | 4 | $1,526 |
| Sobi, Inc | 2 | $61 |
| Amgen | 2 | $48 |
| AbbVie | 2 | $32 |
| Gilead | 1 | $21 |
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.
How this compares
$27,658 in reported general payments places this provider in the 65th percentile of 178 hematology 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 |
|---|---|---|
| IdhifaEnasidenib Mesylate | 23 | $759,275 |
| TibsovoIvosidenib | 14 | $465,397 |
| Deferasirox | 12 | $44,848 |
| Atovaquone | 15 | $5,102 |
| Acyclovir | 25 | $294 |
| Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim | 15 | $67 |
Paid to pharmacies, not to this prescriber.
Other hematology in Duarte
- Amrita KrishnanDuarte$671K
- Vinod PullarkatDuarte$576K
- Alexey DanilovDuarte$407K
- Tycel PhillipsDuarte$348K
- Haris AliDuarte$310K
- Amandeep SalhotraDuarte$214K
- Tanya SiddiqiDuarte$199K
- Scott GoldsmithDuarte$180K
- Ibrahim AldossDuarte$175K
- Alex HerreraDuarte$155K
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.