Michael Maris, MD
Hematology & Oncology · Denver, CONPI 1053395624
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 96.7% of the total across 101 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 27 manufacturers reported payments, led by Bristol Myers Squibb at 27.7% of the total. That places this record below the midpoint for hematology & oncology clinicians in CO, where the typical reported total is $1,826.
Across 101 payments — averaging $22.61 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Bristol Myers Squibb$632
- AbbVie$409
- Mesoblast, Inc.$204
- Pharmacyclics LLC, An Abbvie Company$156
- Incyte Corporation$104
- Astellas Pharma US Inc$69
- plus $711 from 21 others
Across 185 payments — averaging $9109.65 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.
- Bristol Myers Squibb$560K
- Trillium Therapeutics USA, LLC$285K
- AstraZeneca$224K
- Gilead$178K
- Genentech, Inc.$178K
- Macrogenics, Inc.$90K
- plus $170K from 5 others
What the payments were for
- Food & beverage$2,20897%
- Education$763%
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 |
|---|---|---|
| Bristol Myers Squibb | 29 | $632 |
| AbbVie | 18 | $409 |
| Mesoblast, Inc. | 3 | $204 |
| Pharmacyclics LLC, An Abbvie Company | 8 | $156 |
| Incyte Corporation | 3 | $104 |
| Astellas Pharma US Inc | 3 | $69 |
| Rigel Pharmaceuticals, Inc. | 1 | $63 |
| Takeda Pharmaceuticals U.S.A., Inc. | 4 | $60 |
| Johnson & Johnson | 3 | $55 |
| Genentech USA, Inc. | 3 | $50 |
| Novartis | 3 | $46 |
| Legend Biotech USA Inc. | 2 | $46 |
| Amgen | 2 | $43 |
| Jazz Pharmaceuticals Inc. | 2 | $42 |
| Gilead | 2 | $37 |
| Daiichi Sankyo Inc. | 2 | $36 |
| Agios Pharmaceuticals, Inc. | 2 | $33 |
| Autolus Inc | 1 | $29 |
| Verastem, Inc. | 2 | $26 |
| E.r. Squibb & Sons, L.L.C. | 1 | $25 |
| Sanofi | 1 | $22 |
| Pfizer | 1 | $18 |
| Akcea Therapeutics, Inc. | 1 | $18 |
| ADC Therapeutics America, Inc. | 1 | $18 |
| Pharmaessentia USA Corporation | 1 | $15 |
| Janssen Scientific Affairs, LLC | 1 | $14 |
| Merck | 1 | $14 |
How this compares
$2,284 in reported general payments places this provider in the 50th percentile of 169 hematology & oncology providers in Colorado.
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 |
|---|---|---|
| JakafiRuxolitinib Phosphate | 78 | $1,236,730 |
| IdhifaEnasidenib Mesylate | 13 | $444,519 |
| PrevymisLetermovir | 34 | $242,860 |
| RevlimidLenalidomide | 13 | $204,860 |
| XospataGilteritinib Fumarate | 14 | $199,808 |
| BrukinsaZanubrutinib | 12 | $180,560 |
| PromactaEltrombopag Olamine | 11 | $118,701 |
| CresembaIsavuconazonium Sulfate | 15 | $96,133 |
| Posaconazole | 20 | $36,103 |
| EliquisApixaban | 21 | $15,651 |
| Tacrolimus | 17 | $4,023 |
| ValacyclovirValacyclovir Hcl | 63 | $3,222 |
| Ursodiol | 35 | $1,569 |
| Acyclovir | 91 | $1,298 |
| Imatinib Mesylate | 12 | $637 |
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 |
|---|---|---|
| Incyte CorporationJakafi | $104 | $1,236,73078 claims |
| Bristol Myers SquibbIdhifa, Revlimid | $632 | $649,37926 claims |
| Astellas Pharma US IncXospata, Cresemba | $69 | $295,94129 claims |
| MerckPrevymis | $14 | $242,86034 claims |
| NovartisPromacta | $46 | $118,70111 claims |
| PfizerEliquis | $18 | $15,65121 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 50th percentile of 169 hematology & oncology providers in Colorado.
Other hematology & oncology in Denver
- Amy SchmidtDenver$2.8M
- Yousuf GaffarDenver$963K
- Robert RifkinDenver$270K
- Mabel MardonesDenver$149K
- Peter ForsbergDenver$147K
- Peter McSweeneyDenver$126K
- Alireza EghtedarDenver$96K
- Jeffrey MatousDenver$93K
- Tara GregoryDenver$67K
- Michael TeesDenver$56K
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.