Mark Olsen, MD
Hematology & Oncology · Tulsa, OKNPI 1356382592
Payments from drug & device makers
Across 405 payments — averaging $816.52 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Merck$195K
- Eisai Inc.$66K
- E.r. Squibb & Sons, L.L.C.$36K
- Incyte Corporation$12K
- Eli Lilly$10K
- Helsinn Healthcare SA$8K
- plus $3K from 34 others
What the payments were for
- Food & beverage$2,49890%
- Education$26710%
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.
| Company | Payments | Total |
|---|---|---|
| Merck | 191 | $195,075 |
| Eisai Inc. | 47 | $66,490 |
| E.r. Squibb & Sons, L.L.C. | 16 | $36,347 |
| Incyte Corporation | 35 | $11,657 |
| Eli Lilly | 4 | $10,157 |
| Helsinn Healthcare SA | 1 | $7,500 |
| Amgen | 1 | $1,030 |
| Daiichi Sankyo Inc. | 13 | $426 |
| Pfizer | 23 | $348 |
| AstraZeneca(2 entities) | 10 | $187 |
| AbbVie(2 entities) | 8 | $181 |
| Gilead | 3 | $160 |
| Seagen Inc. | 6 | $117 |
| Pharmacyclics LLC, An Abbvie Company | 1 | $105 |
| Sanofi | 5 | $93 |
| Karyopharm Therapeutics Inc. | 3 | $82 |
| Taiho Oncology, Inc. | 3 | $74 |
| Takeda Pharmaceuticals U.S.A., Inc. | 3 | $57 |
| Beone Medicines USA, Inc. | 2 | $47 |
| Novartis | 2 | $46 |
| Bristol Myers Squibb | 2 | $42 |
| Beigene USA, Inc. | 2 | $40 |
| Regeneron Healthcare Solutions, Inc. | 2 | $39 |
| GSK | 2 | $36 |
| Geron Corporation | 2 | $35 |
| Astellas Pharma US Inc | 2 | $34 |
| Genmab U.S., Inc. | 1 | $33 |
| Ipsen Biopharmaceuticals, Inc | 2 | $32 |
| ADC Therapeutics America, Inc. | 1 | $29 |
| Acrotech Biopharma Inc. | 2 | $28 |
| Pharmaessentia USA Corporation | 1 | $23 |
| Agios Pharmaceuticals, Inc. | 1 | $19 |
| Johnson & Johnson | 1 | $19 |
| Bayer | 1 | $17 |
| AVEO Pharmaceuticals, Inc. | 1 | $17 |
| Mirati Therapeutics, Inc. | 1 | $17 |
| Boston Scientific | 1 | $15 |
| Intuitive Surgical | 1 | $13 |
| Genentech USA, Inc. | 1 | $12 |
| Puma Biotechnology, Inc. | 1 | $12 |
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
$330,692 in reported general payments places this provider in the 85th percentile of 118 hematology & oncology providers in Oklahoma.
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 |
|---|---|---|
| RevlimidLenalidomide | 41 | $724,738 |
| ImbruvicaIbrutinib | 21 | $268,598 |
| IbrancePalbociclib | 16 | $253,668 |
| CalquenceAcalabrutinib Maleate | 19 | $220,746 |
| XtandiEnzalutamide | 19 | $192,988 |
| JakafiRuxolitinib Phosphate | 11 | $179,467 |
| Abiraterone Acetate | 30 | $33,877 |
| XareltoRivaroxaban | 18 | $18,617 |
| EliquisApixaban | 20 | $10,910 |
| Letrozole | 48 | $5,948 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 52 | $1,284 |
| Hydroxyurea | 70 | $1,052 |
| Ondansetron OdtOndansetron | 58 | $1,020 |
| Morphine Sulfate ErMorphine Sulfate | 18 | $967 |
| Dexamethasone | 51 | $863 |
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 |
|---|---|---|
| Bristol Myers SquibbRevlimid | $42 | $724,73841 claims |
| Pharmacyclics LLC, An Abbvie CompanyImbruvica | $105 | $268,59821 claims |
| PfizerIbrance, Eliquis | $348 | $264,57836 claims |
| AstraZenecaCalquence | $187 | $220,74619 claims |
| Astellas Pharma US IncXtandi | $34 | $192,98819 claims |
| Incyte CorporationJakafi | $11,657 | $179,46711 claims |
| Johnson & JohnsonXarelto | $19 | $18,61718 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 85th percentile of 118 hematology & oncology providers in Oklahoma.
Other hematology & oncology in Tulsa
- Kevin WeibelTulsa$1.7M
- Scott ColeTulsa$644K
- Caleb ScheckelTulsa$232K
- Melinda DunlapTulsa$174K
- Charles StrnadTulsa$153K
- Hassan KaleemTulsa$137K
- Charles TaylorTulsa$59K
- Ali MoussaTulsa$19K
- Alan KellerTulsa$10K
- Supriya KoyaTulsa$7K
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.