Gregory P. Witkowski, MD
NPI 1750598850ActiveIndividual· Orthopaedic Surgery· Warrenville, IL
Orthopaedic Surgery (MD) in Warrenville, Illinois, trained at Wayne State University School of Medicine (class of 2003). 377 Medicare patients in 2024, $143,213 paid; nearly all of their 189 Part D prescriptions were generic (98%). Arteriocyte Medical Systems, Inc. was the largest of 6 companies reporting payments in 2025, $3,041 in all, mostly speaking and faculty fees.
Overview
| NPI | 1750598850 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 17, 2007 |
| Last updated in NPPES | Feb 19, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Orthopaedic Surgery Primary | 207X00000X | 036123834 | IL |
| Orthopaedic Surgery, Foot and Ankle Surgery | 207XX0004X | 036-123834 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Orthopedic Surgery (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 377 |
|---|---|
| Services billed | 1,448 across 87 procedure codes |
| Paid by Medicare | $143,213 |
Part D prescriptions in 2024
| Prescriptions (claims) | 189 · 205 30-day fills |
|---|---|
| Patients | 82 |
| Total drug cost | $3,915 |
| Generic share | 98% of claims |
Education and affiliations
| Medical school | Wayne State University School of Medicine |
|---|---|
| Graduation year | 2003 |
| Medicare specialty | Orthopedic Surgery |
Medical groups
- Northwestern Medical Faculty FoundationChicago, IL · 4,503 clinicians
- Select Rehabilitation, LLCGlenview, IL · 2,046 clinicians
- Central Dupage Physician GroupGeneva, IL · 1,080 clinicians
Hospital affiliations
- Northwestern Medicine Central Dupage HospitalWinfield, IL
- Northwestern Medicine Delnor Community HospitalGeneva, IL
Other facilities
- Marianjoy Rehabilitation CenterInpatient rehabilitation facility · Wheaton, IL
Industry payments (Open Payments)
- 2025$3,041 · 16 payments from 6 companies
- 2024$6,532 · 18 payments from 7 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Arteriocyte Medical Systems, Inc. | $2,203 | 2 |
| Oak Med, Inc. | $330.25 | 4 |
| Stryker Corporation | $290.97 | 5 |
| Kuros Biosciences USA, Inc | $132.83 | 1 |
| Depuy Synthes Sales Inc. | $70.51 | 2 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$2,000 · 1 payment
- Food and Beverage$1,041 · 15 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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