Mary Michael Westerholm, M.D.
NPI 1790951093ActiveIndividual· Internal Medicine· Winfield, IL
Internal Medicine (M.D.) in Winfield, Illinois, trained at Loyola University of Chicago, Stritch School of Medicine (class of 2004). Part D covered 410 prescriptions written in 2024, 75% of them generic.
Overview
| NPI | 1790951093 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | May 6, 2008 |
| Last updated in NPPES | Apr 15, 2013 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 036116854 | IL |
| Pediatrics | 208000000X | 036116854 | 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) |
|---|
Part D prescriptions in 2024
| Prescriptions (claims) | 410 · 958 30-day fills |
|---|---|
| Patients | 28 |
| Total drug cost | $74,703 |
| Generic share | 75% of claims |
Education and affiliations
| Medical school | Loyola University of Chicago, Stritch School of Medicine |
|---|---|
| Graduation year | 2004 |
| Medicare specialty | Internal Medicine |
Medical groups
- Central Dupage Physician GroupGeneva, IL · 1,080 clinicians
- Lawndale Christian Health CenterChicago, IL · 123 clinicians
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 19 internal medicine physicians in Winfield · All internal medicine physicians in Illinois