Steven Kossman, MD
Hematology & Oncology · San Diego, CANPI 1477628634
Payments from drug & device makers
What this record shows
5 manufacturers reported payments, led by Pharmacyclics LLC, An Abbvie Company at 45.7% of the total. Reporting peaked in 2021 at $99 and has fallen 83.1% since, to $17 in 2025. That places this record below the midpoint for hematology & oncology clinicians in CA, where the typical reported total is $3,371.
Across 7 payments — averaging $30.96 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Pharmacyclics LLC, An Abbvie Company$99
- E.r. Squibb & Sons, L.L.C.$46
- Daiichi Sankyo Inc.$36
- Exelixis Inc.$18
- Gilead$17
What the payments were for
- Food & beverage$9946%
- Education$11754%
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 |
|---|---|---|
| Pharmacyclics LLC, An Abbvie Company | 1 | $99 |
| E.r. Squibb & Sons, L.L.C. | 3 | $46 |
| Daiichi Sankyo Inc. | 1 | $36 |
| Exelixis Inc. | 1 | $18 |
| Gilead | 1 | $17 |
How this compares
$217 in reported general payments places this provider in the 15th 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 |
|---|---|---|
| VenclextaVenetoclax | 13 | $201,944 |
| Ondansetron Hcl | 17 | $296 |
| Letrozole | 13 | $252 |
| Bicalutamide | 12 | $221 |
| Prochlorperazine Maleate | 15 | $215 |
| Duloxetine Hcl | 17 | $196 |
| Prednisone | 13 | $55 |
| Azithromycin | 21 | $42 |
Paid to pharmacies, not to this prescriber.
Other hematology & oncology in San Diego
- Wendy LevinSan Diego$760K
- Rana McKaySan Diego$530K
- Ezra CohenSan Diego$495K
- 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
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.