Allison Patricia Rzepczynski, MD
NPI 1649708975ActiveIndividual· Internal Medicine, Gastroenterology· Elmhurst, IL
Internal Medicine, Gastroenterology (MD) in Elmhurst, Illinois, trained at Loyola University of Chicago, Stritch School of Medicine (class of 2017). In 2024 Medicare paid $46,664 for 208 patients, and Part D covered 339 of their prescriptions, 75% of them generic. Madrigal Pharmaceuticals reported $140.54 in payments in 2025, mostly food and beverage.
Overview
| NPI | 1649708975 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | May 31, 2017 |
| Last updated in NPPES | Jul 26, 2023 |
| Certified by provider | Jul 26, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Gastroenterology Primary | 207RG0100X | 036152640 | IL |
| Internal Medicine | 207R00000X | 125070546 | 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 | 208 |
|---|---|
| Services billed | 472 across 32 procedure codes |
| Paid by Medicare | $46,664 |
Part D prescriptions in 2024
| Prescriptions (claims) | 339 · 577 30-day fills |
|---|---|
| Patients | 181 |
| Total drug cost | $44,557 |
| Generic share | 75% of claims |
Education and affiliations
| Medical school | Loyola University of Chicago, Stritch School of Medicine |
|---|---|
| Graduation year | 2017 |
| Medicare specialty | Gastroenterology |
Medical group
- Endeavor Health Medical GroupEvanston, IL · 3,350 clinicians
Hospital affiliations
- Edward HospitalNaperville, IL
- Elmhurst Memorial HospitalElmhurst, IL
Industry payments (Open Payments)
- 2025$140.54 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Madrigal Pharmaceuticals | $140.54 | 1 |
What the 2025 payments were for
- Food and Beverage$140.54 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 15 gastroenterologists in Elmhurst · All gastroenterologists in Illinois