Dean Silas, MD
NPI 1093809089ActiveIndividual· Internal Medicine, Gastroenterology· Niles, IL
Internal Medicine, Gastroenterology (MD) in Niles, Illinois, trained at University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) (class of 1984). Their prescriptions cost Medicare Part D more than their services did: $617,563 for 962 claims, against $88,716 paid for services in 2024. Madrigal Pharmaceuticals was the largest of 2 companies reporting payments in 2024, $141.71 in all, mostly food and beverage.
Overview
| NPI | 1093809089 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Oct 3, 2006 |
| Last updated in NPPES | Dec 20, 2021 |
| Certified by provider | Dec 20, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 036079922 | 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 - Gastroenterology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 526 |
|---|---|
| Services billed | 911 across 49 procedure codes |
| Paid by Medicare | $88,716 |
Part D prescriptions in 2024
| Prescriptions (claims) | 962 · 1,962 30-day fills |
|---|---|
| Patients | 344 |
| Total drug cost | $617,563 |
| Generic share | 80% of claims |
Education and affiliations
| Medical school | University of Illinois College of Med (Chi/Peor/Rock/Chm-Urb) |
|---|---|
| Graduation year | 1984 |
| Medicare specialty | Gastroenterology |
Hospital affiliation
- Advocate Lutheran General HospitalPark Ridge, IL
Industry payments (Open Payments)
- 2024$141.71 · 2 payments from 2 companies
Top paying companies in 2024
| Company | Amount | Payments |
|---|---|---|
| Madrigal Pharmaceuticals | $121.48 | 1 |
| Boston Scientific Corporation | $20.23 | 1 |
What the 2024 payments were for
- Food and Beverage$141.71 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 20 gastroenterologists in Niles · All gastroenterologists in Illinois