Amer Kassar, MD
NPI 1932208063ActiveIndividual· Internal Medicine, Endocrinology, Diabetes & Metabolism· Dekalb, IL
Internal Medicine, Endocrinology, Diabetes & Metabolism (MD) with Gn Endocrinology Ltd, practicing in Dekalb, Illinois. Their prescriptions cost Medicare Part D more than their services did: $4,744,384 for 9,200 claims, against $337,393 paid for services in 2024. Medtronic, Inc. was the largest of 31 companies reporting payments in 2025, $5,802 in all, mostly food and beverage. Lists Community Hospital and 4 other hospitals as hospital affiliations.
Overview
| NPI | 1932208063 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Sep 22, 2006 |
| Last updated in NPPES | Jan 6, 2021 |
| Certified by provider | Jan 6, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Endocrinology, Diabetes & Metabolism Primary | 207RE0101X | 036124942 | IL |
Exclusion screening
| List | Result | Details |
|---|---|---|
| HHS-OIG LEIE · Oct 9, 2026 | No match | Checked by NPI and by name + state |
| North Carolina Medicaid · Nov 10, 2026 | No match | — |
| New York OMIG · Nov 10, 2026 | No match | — |
| Ohio Medicaid · Nov 10, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 10, 2026 | No match | — |
| Washington HCA · Nov 10, 2026 | No match | — |
Official OIG search · How matching works ·Bulk check a roster
Medicare
| Enrollment (PECOS) | Enrolled Practitioner - Endocrinology (IN) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 1,174 |
|---|---|
| Services billed | 5,526 across 39 procedure codes |
| Paid by Medicare | $337,393 |
Part D prescriptions in 2024
| Prescriptions (claims) | 9,200 · 19,904 30-day fills |
|---|---|
| Patients | 1,392 |
| Total drug cost | $4,744,384 |
| Generic share | 40% of claims |
Education and affiliations
| Graduation year | 2001 |
|---|---|
| Medicare specialty | Endocrinology |
| Secondary specialties | Internal Medicine |
Medical group
- Gn Endocrinology LtdFishers, IN · 7 clinicians
Hospital affiliations
- Community HospitalMunster, IN
- Franciscan Health Crown PointCrown Point, IN
- Franciscan Health MunsterMunster, IN
- St Catherine Hospital IncEast Chicago, IN
- St Mary Medical Center IncHobart, IN
Other facilities
- Powers Health Rehabilitation CenterInpatient rehabilitation facility · Crown Point, IN
Industry payments (Open Payments)
- 2025$5,802 · 273 payments from 31 companies
- 2024$13,358 · 319 payments from 33 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Medtronic, Inc. | $611.31 | 10 |
| Ascensia Diabetes Care US Inc. | $483.31 | 11 |
| Recordati_rare_diseases_inc. | $408.23 | 23 |
| Amgen Inc. | $404.70 | 27 |
| Lilly USA, LLC | $396.65 | 29 |
What the 2025 payments were for
- Food and Beverage$5,802 · 273 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Endocrinology, Diabetes & Metabolism providers in Dekalb
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All Internal Medicine, Endocrinology, Diabetes & Metabolism providers in Illinois →