Physician profile
Mark Klaassen
NPI 1053325589
$1,320,813.31
in general payments reported to CMS, 2019-2025
23 companies · $74K in 2025
The $74K reported for 2025 was more than what 96% of Orthopaedic Surgery providers received nationally (typical 2025 total: $569).
Payments by year
General and research payments by program year, as reported to CMS.
General payments by year: 2019: $187K · 2020: $123K · 2021: $124K · 2022: $640K · 2023: $118K · 2024: $54K · 2025: $74K.
What the payments were for
Nature of payment as categorized by the reporting companies: meals, consulting, travel, and so on.
Royalty Or License: $118K · Acquisitions: $59K · Consulting Fee: $51K · Travel and Lodging: $9,715 · Food and Beverage: $5,227 · Education: $4,250.
View as a table
| Payment type | Amount (2023-2025) |
|---|---|
| Royalty Or License | $117,573.24 |
| Acquisitions | $58,534.07 |
| Consulting Fee | $51,070.00 |
| Travel and Lodging | $9,715.10 |
| Food and Beverage | $5,227.34 |
| Education | $4,250.00 |
Payment-type detail covers 2023-2025; earlier years are included in totals but not broken out here.
Who reported paying
General payments only, as reported to CMS. Research payments are listed separately below. Product names cover 2023-2025.
| Company | General payments | Years | Top products |
|---|---|---|---|
| Smith+Nephew, INC. | $616,605.98 | 2021-2025 | Engage Partial Knee System, Journey II, Real Intelligence |
| Zimmer Biomet Holdings, INC. | $292,080.07 | 2019-2025 | Rosa, Persona, Taperloc |
| Medacta USA, INC. | $279,364.26 | 2019-2025 | Gmk Sphere, Amistem |
| Exactech, INC. | $100,395.38 | 2019-2024 | |
| Arthrex, INC. | $11,216.00 | 2021-2025 | |
| Encore Medical, LP | $8,443.38 | 2023-2024 | Djo Surgical |
| Orthosensor INC. | $5,065.78 | 2019 | |
| Stryker Corporation | $2,766.05 | 2019-2025 | Mako, T2 |
| Engage Uni, LLC | $1,939.32 | 2020-2021 | |
| Heron Therapeutics, INC. | $1,500.00 | 2020 | |
| Osteoremedies, LLC | $522.70 | 2021-2025 | Remedy Spectrum Gv Spacer, Remedy Spacer, Biobrush |
| Nextremity Solutions INC. | $184.83 | 2019 | |
| Nevro Corp. | $143.20 | 2021 | |
| Pacira Therapeutics, INC. | $125.93 | 2019 | |
| Microport Orthopedics INC | $99.89 | 2021-2022 |
Show all 23 companies
| Company | General payments | Years | Top products |
|---|---|---|---|
| Linkbio Corp | $70.28 | 2025 | |
| Moximed, INC | $66.88 | 2025 | Misha Knee System, Small, Left |
| Uoc USA INC | $66.78 | 2024 | U2, Conformity, U-Motion II and Ustar II |
| Linvatec Corporation | $56.25 | 2022 | |
| Orthalign INC | $48.13 | 2023 | Orthalign Plus |
| Ethicon US, LLC | $18.95 | 2021 | |
| Medtronic, INC. | $17.22 | 2023 | V-Loc 180 |
| Orthofix Medical, INC. | $16.05 | 2022 |
Drugs and devices associated with these payments
CMS records which products a payment was associated with, not how the money was allocated. Association is not allocation: one payment can be associated with several products, and a product listing does not mean the payment was made because of that product. Product detail covers 2023-2025.
Research and ownership
$14,710.00 in research payments reported 2019-2025. Research payments are often institution-directed and tied to clinical trials: they are reported under a clinician's name but frequently go to a hospital or research organization, and usually reflect participation in medical research.
$896,241.28 in ownership or investment interests, as reported to CMS. These are holdings a clinician or an immediate family member has in a company, not payments received.
If you want to bring it up
Most clinicians are glad to talk about this. A respectful way in:
- "I saw Mark Klaassen listed in the CMS Open Payments database. Can you tell me about your work with those companies?"
- "Is there a generic or alternative to this medication, and would it work as well for me?"
- "What made you choose this particular treatment for my situation?"
These are normal questions. A good clinician will welcome them.
Share this page
Keep an eye on this page
Get an email when the next June refresh changes this page. No account needed.
Source: CMS Open Payments, program years 2019-2025, as reported to CMS by drug and device makers (published June 30, 2026). Drug and device detail covers 2023-2025.