Ezra Cohen, MD
Hematology & Oncology · San Diego, CANPI 1518029065
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $308,343 of the $494,654 with a category attached, or 62.3%. 35 manufacturers reported payments, led by Merck at 46.1% of the total. Reporting peaked in 2019 at $201,695 and has fallen 97.5% since, to $5,000 in 2025. Among hematology & 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 276 payments — averaging $1792.22 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Merck$228K
- Merck Kgaa$41K
- EMD Serono, Inc.$39K
- Eisai CO., LTD.$21K
- Regeneron Healthcare Solutions, Inc.$18K
- Eisai Inc.$16K
- plus $132K from 29 others
Across 172 payments — averaging $28,887 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.
- Merck$3.8M
- Astrazeneca UK Limited$394K
- Genentech, Inc.$239K
- Regeneron$91K
- Hoffmann-la Roche Limited$77K
- Genmab U.S., Inc.$61K
- plus $268K from 12 others
What the payments were for
- Consulting fees$308,34362%
- Speaking & faculty fees$115,01323%
- Travel & lodging$67,58914%
- Food & beverage$3,7081%
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 |
|---|---|---|
| Merck | 119 | $228,156 |
| Merck Kgaa | 12 | $40,610 |
| EMD Serono, Inc. | 20 | $38,784 |
| Eisai CO., LTD. | 3 | $20,846 |
| Regeneron Healthcare Solutions, Inc. | 14 | $18,290 |
| Eisai Inc. | 13 | $16,011 |
| Sanofi | 6 | $15,311 |
| Regeneron | 9 | $15,236 |
| F. Hoffmann-la Roche AG | 6 | $12,832 |
| AVEO Pharmaceuticals, Inc. | 2 | $10,000 |
| GSK | 16 | $9,626 |
| Pfizer | 4 | $5,994 |
| E.r. Squibb & Sons, L.L.C. | 10 | $5,722 |
| AbbVie | 5 | $5,221 |
| Janssen Global Services, LLC | 3 | $4,960 |
| Eli Lilly | 1 | $4,900 |
| Bayer | 4 | $4,868 |
| Blueprint Medicines Corporation | 2 | $3,920 |
| Alkermes, Inc. | 2 | $3,900 |
| Gilead | 1 | $3,610 |
| Novartis | 2 | $3,413 |
| Astellas Pharma Global Development | 1 | $3,400 |
| Ipsen Bioscience Inc. | 2 | $3,020 |
| Cidara Therapeutics, Inc. | 1 | $3,000 |
| Kowa Research Institute, Inc. | 1 | $3,000 |
| Boehringer Ingelheim International GmbH | 5 | $2,571 |
| Astrazeneca UK Limited | 1 | $2,398 |
| Exelixis Inc. | 1 | $1,980 |
| Janssen Research & Development, LLC | 1 | $1,240 |
| Jazz Pharmaceuticals Inc. | 1 | $1,240 |
| Genmab U.S., Inc. | 1 | $375 |
| AstraZeneca | 3 | $123 |
| Roche Products Limited | 2 | $46 |
| Coherus Oncology, Inc. | 1 | $32 |
| Genentech, Inc. | 1 | $19 |
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
$494,654 in reported general payments places this provider in the 95th percentile of 1,363 hematology & 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 |
|---|---|---|
| MekinistTrametinib Dimethyl Sulfoxide | 14 | $182,539 |
| TafinlarDabrafenib Mesylate | 14 | $178,541 |
| Levothyroxine Sodium | 17 | $280 |
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 |
|---|---|---|
| NovartisMekinist, Tafinlar | $3,413 | $361,08028 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 1,363 hematology & oncology providers in California.
Other hematology & oncology in San Diego
- Wendy LevinSan Diego$760K
- Rana McKaySan Diego$530K
- Annette von DrygalskiSan Diego$406K
- Lyudmila BazhenovaSan Diego$328K
- Sandip PatelSan Diego$295K
- Dennis SlamonLos Angeles$3.1M
- Sandra HorningStanford$2.5M
- Mohammadbagher ZiariCorona$2.5M
- George YaghmourLos Angeles$1.9M
- Robert VescioWest Hollywood$1.1M
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.