Hannah L. Mallaro, MD
NPI 1255858494ActiveIndividual· Internal Medicine· Madison, WI
Internal Medicine (MD) in Madison, Wisconsin, trained at Northwestern University Feinberg Medical School (class of 2021). Their prescriptions cost Medicare Part D more than their services did: $38,797 for 495 claims, against $8,375 paid for services in 2024. Idorsia Pharmaceuticals US Inc reported $120.82 in payments in 2025, mostly education.
Overview
| NPI | 1255858494 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 28, 2017 |
| Last updated in NPPES | Dec 10, 2024 |
| Certified by provider | Dec 10, 2024 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 83410 | WI |
| Internal Medicine | 207R00000X | 125.077754 | 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 (WI) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 84 |
|---|---|
| Services billed | 190 across 17 procedure codes |
| Paid by Medicare | $8,375 |
Part D prescriptions in 2024
| Prescriptions (claims) | 495 · 977 30-day fills |
|---|---|
| Patients | 102 |
| Total drug cost | $38,797 |
| Generic share | 85% of claims |
Education and affiliations
| Medical school | Northwestern University Feinberg Medical School |
|---|---|
| Graduation year | 2021 |
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- University of Wisconsin Medical Foundation IncMadison, WI · 2,553 clinicians
Hospital affiliations
- Stoughton HospitalStoughton, WI
- Unitypoint Health - MeriterMadison, WI
- University of Wi Hospitals & Clinics AuthorityMadison, WI
Industry payments (Open Payments)
- 2025$120.82 · 2 payments from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Idorsia Pharmaceuticals US Inc | $120.82 | 2 |
What the 2025 payments were for
- Education$120.82 · 2 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 417 internal medicine physicians in Madison · All internal medicine physicians in Wisconsin