Piotr Michaliszyn, MD
NPI 1093177024ActiveIndividual· Internal Medicine· Elgin, IL
Internal Medicine (MD) with Advocate Health and Hospitals Corporation, practicing in Elgin, Illinois. 264 Medicare patients in 2024, $72,026 paid; nearly all of their 186 Part D prescriptions were generic (94%). Boehringer Ingelheim Pharmaceuticals, Inc. reported $99.93 in payments in 2025, mostly food and beverage. Lists Advocate Sherman Hospital as a hospital affiliation.
Overview
| NPI | 1093177024 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | Yes |
| NPI issued | Mar 29, 2016 |
| Last updated in NPPES | Dec 29, 2021 |
| Certified by provider | Dec 29, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 036-148777 | 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 - Internal Medicine (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 264 |
|---|---|
| Services billed | 801 across 9 procedure codes |
| Paid by Medicare | $72,026 |
Part D prescriptions in 2024
| Prescriptions (claims) | 186 · 201 30-day fills |
|---|---|
| Patients | 102 |
| Total drug cost | $4,938 |
| Generic share | 94% of claims |
Education and affiliations
| Graduation year | 2016 |
|---|---|
| Medicare specialty | Internal Medicine |
Medical group
- Advocate Health and Hospitals CorporationChicago, IL · 3,118 clinicians
Hospital affiliation
- Advocate Sherman HospitalElgin, IL
Industry payments (Open Payments)
- 2025$99.93 · 1 payment from 1 company
- 2024$406.93 · 5 payments from 5 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Boehringer Ingelheim Pharmaceuticals, Inc. | $99.93 | 1 |
What the 2025 payments were for
- Food and Beverage$99.93 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 85 internal medicine physicians in Elgin · All internal medicine physicians in Illinois