Benjamin Nathan Massat
NPI 1659909711ActiveIndividual· Internal Medicine, Hematology & Oncology· Maywood, IL
Internal Medicine, Hematology & Oncology with Loyola University Medical Center, practicing in Maywood, Illinois. Enrolled in Medicare as practitioner - hematology. Gamida Cell Inc. was the largest of 5 companies reporting payments in 2025, $275.53 in all, mostly food and beverage.
Overview
| NPI | 1659909711 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Sole proprietor | No |
| NPI issued | Apr 1, 2020 |
| Last updated in NPPES | Jun 23, 2023 |
| Certified by provider | Jun 23, 2023 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 036165424 | 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 - Hematology (IL) |
|---|
Education and affiliations
| Graduation year | 2020 |
|---|---|
| Medicare specialty | Hematology |
Medical group
- Loyola University Medical CenterMaywood, IL · 953 clinicians
Industry payments (Open Payments)
- 2025$275.53 · 5 payments from 5 companies
- 2024$184.94 · 4 payments from 4 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Gamida Cell Inc. | $106.33 | 1 |
| Genzyme Corporation | $90.30 | 1 |
| Beigene USA, Inc. | $35.00 | 1 |
| Adaptive Biotechnologies Corporation | $22.51 | 1 |
| Sobi, Inc | $21.39 | 1 |
What the 2025 payments were for
- Food and Beverage$275.53 · 5 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other Internal Medicine, Hematology & Oncology providers in Maywood
- 1679550842
- 1417182858
- 1619321031
- 1598388480
- 1306823679
- 1629059431
- 1548434723
- 1780032664
- 1770285116
- 1972580843
- 1285138677
- 1083863310
All Internal Medicine, Hematology & Oncology providers in Illinois →