Matthew Bernard Siegel, MD
NPI 1639333263ActiveIndividual· Internal Medicine, Hematology & Oncology· Naperville, IL
Internal Medicine, Hematology & Oncology (MD) in Naperville, Illinois, trained at Loyola University of Chicago, Stritch School of Medicine (class of 2008). Their prescriptions cost Medicare Part D more than their services did: $3,348,653 for 1,416 claims, against $131,248 paid for services in 2024. Orthofix Medical, Inc. was the largest of 4 companies reporting payments in 2025, $320.34 in all, mostly food and beverage.
Overview
| NPI | 1639333263 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jul 14, 2008 |
| Last updated in NPPES | Mar 12, 2021 |
| Certified by provider | Mar 12, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | PG158554 | OR |
| Internal Medicine | 207R00000X | 125054173 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Nov 10, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 11, 2026 | No match | — |
| New York OMIG · Nov 11, 2026 | No match | — |
| Ohio Medicaid · Nov 11, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 11, 2026 | No match | — |
| Washington HCA · Nov 11, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Hematology/Oncology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 294 |
|---|---|
| Services billed | 1,918 across 15 procedure codes |
| Paid by Medicare | $131,248 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,416 · 2,162 30-day fills |
|---|---|
| Patients | 174 |
| Total drug cost | $3,348,653 |
| Generic share | 70% of claims |
Education and affiliations
| Medical school | Loyola University of Chicago, Stritch School of Medicine |
|---|---|
| Graduation year | 2008 |
| Medicare specialty | Hematology/Oncology |
Medical group
- Endeavor Health Medical GroupEvanston, IL · 3,350 clinicians
Hospital affiliations
- Edward HospitalNaperville, IL
- Elmhurst Memorial HospitalElmhurst, IL
- Swedish HospitalChicago, IL
Industry payments (Open Payments)
- 2025$320.34 · 6 payments from 4 companies
- 2024$81.97 · 4 payments from 2 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Orthofix Medical, Inc. | $195.53 | 2 |
| Pfizer Inc. | $55.98 | 2 |
| Celgene Corporation | $34.71 | 1 |
| Dendreon Pharmaceuticals LLC | $34.12 | 1 |
What the 2025 payments were for
- Food and Beverage$320.34 · 6 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 16 hematologist-oncologists in Naperville · All hematologist-oncologists in Illinois