Mark Dennis, MD
Diagnostic Radiology · Englewood, CONPI 1649256561
Payments from drug & device makers
What this record shows
This record is dominated by royalties or licence payments: $3,218,525 of the $4,670,408 with a category attached, or 68.9%. Medtronic accounts for 80.4% of it on its own, with 2 other manufacturers making up the rest. Reporting peaked in 2020 at $3,224,534 and has fallen 99.7% since, to $8,457 in 2025. Among diagnostic radiology clinicians in CO 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 17 payments — averaging $274,730 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Medtronic$3.8M
- Kaleo, Inc.$917K
- Canon Medical Systems USA, Inc.$31
What the payments were for
- Royalty or licence$3,218,52569%
- Food & beverage$310%
- Ownership interest$6,0090%
- Other$1,445,84231%
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 |
|---|---|---|
| Medtronic(2 entities) | 14 | $3,753,167 |
| Kaleo, Inc. | 2 | $917,209 |
| Canon Medical Systems USA, Inc. | 1 | $31 |
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.
- Ellipsys$3,610,236
- ELLIPSYS VASCULAR ACCESS SYSTEM$142,931
How this compares
$4,670,408 in reported general payments places this provider in the 95th percentile of 625 diagnostic radiology 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.
Other diagnostic radiology in Englewood
- Joseph SteeleEnglewood$4.9M
- Steve ParkerEnglewood$3M
- Donald FreiEnglewood$1.2M
- Dennis GriffinEnglewood$331K
- Ian KaminskyEnglewood$275K
- Andrew FisherEnglewood$247K
- James LuethkeEnglewood$195K
- Stanley SmazalEnglewood$158K
- Richard BellonEnglewood$49K
- Lora BarkeEnglewood$45K
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.