Mary Prem, MD
NPI 1912918301ActiveIndividual· Internal Medicine· Munster, IN
Internal Medicine (MD) with Franciscan Physician Network, practicing in Munster, Indiana. Their prescriptions cost Medicare Part D more than their services did: $873,689 for 9,791 claims, against $95,595 paid for services in 2024. Amgen Inc. was the largest of 10 companies reporting payments in 2025, $359.15 in all, mostly food and beverage. Lists Franciscan Health Crown Point and 2 other hospitals as hospital affiliations.
Overview
| NPI | 1912918301 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Aug 10, 2006 |
| Last updated in NPPES | Oct 16, 2023 |
| Certified by provider | Oct 16, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine Primary | 207R00000X | 01063227A | IN |
| Internal Medicine | 207R00000X | MT183455 | PA |
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 (IN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 307 |
|---|---|
| Services billed | 1,215 across 31 procedure codes |
| Paid by Medicare | $95,595 |
Part D prescriptions in 2024
| Prescriptions (claims) | 9,791 · 20,875 30-day fills |
|---|---|
| Patients | 649 |
| Total drug cost | $873,689 |
| Generic share | 87% of claims |
Education and affiliations
| Graduation year | 1981 |
|---|---|
| Medicare specialty | Internal Medicine |
| Telehealth | Offers telehealth |
Medical group
- Franciscan Physician NetworkShelbyville, IN · 1,170 clinicians
Hospital affiliations
- Franciscan Health Crown PointCrown Point, IN
- Franciscan Health DyerDyer, IN
- Franciscan Health MunsterMunster, IN
Other facilities
- Franciscan Home CareHome health agency · Hobart, IN
Industry payments (Open Payments)
- 2025$359.15 · 19 payments from 10 companies
- 2024$69.74 · 4 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Amgen Inc. | $56.94 | 3 |
| Abbvie Inc. | $48.81 | 2 |
| Lilly USA, LLC | $47.27 | 2 |
| Pfizer Inc. | $44.55 | 2 |
| Astrazeneca Pharmaceuticals LP | $35.47 | 2 |
What the 2025 payments were for
- Food and Beverage$359.15 · 19 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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All 48 internal medicine physicians in Munster · All internal medicine physicians in Indiana