Mark A. Klaassen, MD
NPI 1053325589ActiveIndividual· Orthopaedic Surgery· Warsaw, IN
Orthopaedic Surgery (MD) in Warsaw, Indiana, trained at Indiana University School of Medicine (class of 1982). Part D covered 50 prescriptions written in 2024, 100% of them generic. Medacta USA, Inc. was the largest of 8 companies reporting payments in 2025, $73,996 in all, mostly royalties and licenses.
Overview
| NPI | 1053325589 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 28, 2006 |
| Last updated in NPPES | Dec 23, 2025 |
| Certified by provider | Dec 23, 2025 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Orthopaedic Surgery Primary | 207X00000X | 01031923A | IN |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Orthopedic Surgery (IN) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 50 · 63 30-day fills |
|---|---|
| Patients | 42 |
| Total drug cost | $133.88 |
| Generic share | 100% of claims |
Education and affiliations
| Medical school | Indiana University School of Medicine |
|---|---|
| Graduation year | 1982 |
| Medicare specialty | Orthopedic Surgery |
Medical group
- Orthopaedics Northeast PCFort Wayne, IN · 79 clinicians
Hospital affiliations
- Goshen HospitalGoshen, IN
- Kosciusko Community HospitalWarsaw, IN
- Orthopaedic Hospital at Parkview NorthFort Wayne, IN
- Parkview Whitley HospitalColumbia City, IN
Industry payments (Open Payments)
- 2025$73,996 · 38 payments from 8 companies
- 2024$54,133 · 42 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Medacta USA, Inc. | $33,767 | 5 |
| Smith+nephew, Inc. | $17,604 | 1 |
| Zimmer Biomet Holdings, Inc. | $14,108 | 26 |
| Arthrex, Inc. | $8,000 | 1 |
| Stryker Corporation | $207.02 | 2 |
What the 2025 payments were for
- Royalty or License$36,095 · 8 payments
- Acquisitions$17,604 · 1 payment
- Consulting Fee$14,563 · 6 payments
- Education$4,250 · 3 payments
- Food and Beverage$952.67 · 17 payments
- Travel and Lodging$532.10 · 3 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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