Bassem Chaar, M.D.
NPI 1497783179ActiveIndividual· Internal Medicine, Hematology & Oncology· Chicago Ridge, IL
Internal Medicine, Hematology & Oncology (M.D.) with Affiliated Oncologists LLC, practicing in Chicago Ridge, Illinois. Their prescriptions cost Medicare Part D more than their services did: $5,248,140 for 2,260 claims, against $2,778,979 paid for services in 2024. Novartis Pharmaceuticals Corporation was the largest of 12 companies reporting payments in 2025, $954.17 in all, mostly food and beverage. Lists Advocate Christ Hospital & Medical Center and 3 other hospitals as hospital affiliations.
Overview
| NPI | 1497783179 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 29, 2006 |
| Last updated in NPPES | Dec 30, 2021 |
| Certified by provider | Dec 30, 2021 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 036.138654 | IL |
| Internal Medicine, Hematology & Oncology | 207RH0003X | 2002015286 | MO |
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/Oncology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 468 |
|---|---|
| Services billed | 178,533 across 140 procedure codes |
| Paid by Medicare | $2,778,979 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,260 · 3,043 30-day fills |
|---|---|
| Patients | 233 |
| Total drug cost | $5,248,140 |
| Generic share | 75% of claims |
Education and affiliations
| Graduation year | 1998 |
|---|---|
| Medicare specialty | Hematology/Oncology |
| Telehealth | Offers telehealth |
Medical group
- Affiliated Oncologists LLCMokena, IL · 44 clinicians
Hospital affiliations
- Advocate Christ Hospital & Medical CenterOak Lawn, IL
- Osf Little Company of Mary Medical CenterEvergreen Park, IL
- Palos Community HospitalPalos Heights, IL
- Silver Cross Hospital and Medical CentersNew Lenox, IL
Industry payments (Open Payments)
- 2025$954.17 · 43 payments from 12 companies
- 2024$897.36 · 41 payments from 18 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Novartis Pharmaceuticals Corporation | $301.85 | 17 |
| Abbvie Inc. | $188.69 | 10 |
| Sobi, Inc | $99.95 | 1 |
| Agios Pharmaceuticals, Inc. | $95.33 | 4 |
| Glaxosmithkline, LLC. | $85.74 | 3 |
What the 2025 payments were for
- Food and Beverage$854.22 · 42 payments
- Education$99.95 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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