Zachary Joe Maranar Leshen, M.D.
NPI 1285646729ActiveIndividual· Internal Medicine, Interventional Cardiology· Mishawaka, IN
Internal Medicine, Interventional Cardiology (M.D.) with Saint Joseph Regional Medical Center Inc, practicing in Mishawaka, Indiana. Their prescriptions cost Medicare Part D more than their services did: $1,035,943 for 5,890 claims, against $117,839 paid for services in 2024. Pfizer Inc. was the largest of 16 companies reporting payments in 2025, $1,415 in all, mostly food and beverage. Lists Memorial Hospital of South Bend and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1285646729 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Aug 13, 2006 |
| Last updated in NPPES | Jul 10, 2023 |
| Certified by provider | Jul 10, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Interventional Cardiology Primary | 207RI0011X | 01072811A | IN |
| Internal Medicine | 207R00000X | ML20008451 | WA |
| Internal Medicine | 207R00000X | 4301092796 | MI |
| Internal Medicine, Cardiovascular Disease | 207RC0000X | 01072811A | IN |
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 - Cardiovascular Disease (Cardiology) (IN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,053 |
|---|---|
| Services billed | 2,504 across 61 procedure codes |
| Paid by Medicare | $117,839 |
Part D prescriptions in 2024
| Prescriptions (claims) | 5,890 · 15,855 30-day fills |
|---|---|
| Patients | 709 |
| Total drug cost | $1,035,943 |
| Generic share | 85% of claims |
Education and affiliations
| Graduation year | 2005 |
|---|---|
| Medicare specialty | Cardiovascular Disease (Cardiology) |
Medical group
- Saint Joseph Regional Medical Center IncMishawaka, IN · 138 clinicians
Hospital affiliations
- Memorial Hospital of South BendSouth Bend, IN
- Saint Joseph Regional Medical CenterMishawaka, IN
- Saint Joseph Regional Medical Center - PlymouthPlymouth, IN
- Unity Physicians HospitalMishawaka, IN
Industry payments (Open Payments)
- 2025$1,415 · 69 payments from 16 companies
- 2024$1,448 · 68 payments from 19 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Pfizer Inc. | $218.23 | 24 |
| Abiomed | $207.13 | 4 |
| Boston Scientific Corporation | $182.25 | 4 |
| Merck Sharp & Dohme LLC | $122.84 | 6 |
| Novartis Pharmaceuticals Corporation | $122.31 | 8 |
What the 2025 payments were for
- Food and Beverage$1,415 · 69 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records