Gregory Witkowski, MD
Orthopaedic Surgery · Warrenville, ILNPI 1750598850
Payments from drug & device makers
What this record shows
This record is dominated by other: $727,494 of the $750,096 with a category attached, or 97.0%. Johnson & Johnson accounts for 64.3% of it on its own, with 18 other manufacturers making up the rest. Reporting peaked in 2022 at $482,836 and has fallen 99.4% since, to $3,041 in 2025. Among orthopaedic surgery clinicians in IL 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 97 payments — averaging $7732.94 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Johnson & Johnson$482K
- Arteriocyte Medical Systems, Inc.$254K
- Biotissue Holdings Inc.$4K
- Paragon 28, Inc.$4K
- Medical Device Business Services, Inc.$2K
- Stryker$1K
- plus $3K from 13 others
What the payments were for
- Consulting fees$2,3150%
- Speaking & faculty fees$9,5001%
- Travel & lodging$4,1491%
- Food & beverage$6,5521%
- Education$850%
- Other$727,49497%
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 |
|---|---|---|
| Johnson & Johnson | 12 | $482,051 |
| Arteriocyte Medical Systems, Inc. | 6 | $254,110 |
| Biotissue Holdings Inc. | 10 | $4,160 |
| Paragon 28, Inc. | 14 | $3,624 |
| Medical Device Business Services, Inc. | 6 | $2,155 |
| Stryker(2 entities) | 16 | $1,089 |
| Fusion Orthopedics USA, LLC | 3 | $567 |
| Oak Med, Inc. | 7 | $529 |
| Nuvasive Specialized Orthopedics, Inc. | 4 | $363 |
| Illuminoss Medical, Inc. | 5 | $342 |
| X-spine Systems, Inc. | 4 | $229 |
| Abyrx, Inc | 1 | $186 |
| Medshape, Inc. | 1 | $160 |
| Kuros Biosciences USA, Inc | 1 | $133 |
| Medwest Associates | 1 | $118 |
| Smith+Nephew | 2 | $108 |
| Biocomposites Inc | 1 | $83 |
| Amniox Medical, Inc. | 2 | $68 |
| Bioventus LLC | 1 | $21 |
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.
- NEOX$4,004
- CLARIX$4,004
- TFN ADVANCED$2,048
- MODULAR CATHCART Femoral Head$2,048
- Influx$2,000
- Portfolio$1,820
- Magellan$1,081
- MOTOBAND$860
- Product Portfolio$757
- Photodynamic Bone Stabilization Procedure Pack$328
- TRAUMA PORTFOLIO$311
- PRECICE$298
- TAR$212
- AUGMENT$209
- Montage Settable Resorbable Hemostatic Bone Putty$186
- CARTIVA$159
- NA$141
- APEX 3D$133
- MagnetOs$133
- ANKLE FX$131
How this compares
$750,096 in reported general payments places this provider in the 95th percentile of 844 orthopaedic surgery providers in Illinois.
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 |
|---|---|---|
| Gabapentin | 31 | $353 |
| Hydrocodone-AcetaminophenHydrocodone/Acetaminophen | 40 | $296 |
| Tramadol Hcl | 16 | $110 |
| Diclofenac Sodium | 11 | $71 |
| Ondansetron Hcl | 29 | $59 |
Paid to pharmacies, not to this prescriber.
Other orthopaedic surgery in Warrenville
- Aaron BareWarrenville$175K
- Peter BonuttiEffingham$24.3M
- Steven HaddadGlenview$12.6M
- Aaron RosenbergChicago$12.4M
- Treg BrownHerrin$6.6M
- Wayne GoldsteinMorton Grove$4.9M
- Steven ChudikWestmont$4.1M
- Matthew SquireAurora$2.9M
- David ManningBurr Ridge$2.3M
- Ritesh ShahMorton Grove$2.3M
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.