Mahmoud Mahafzah, MD, PH.D
NPI 1134148091ActiveIndividual· Internal Medicine, Hematology & Oncology· Chicago Ridge, IL
Internal Medicine, Hematology & Oncology (MD, PH.D) with Affiliated Oncologists LLC, practicing in Chicago Ridge, Illinois. Their prescriptions cost Medicare Part D more than their services did: $2,191,721 for 758 claims, against $354,654 paid for services in 2024. Astrazeneca Pharmaceuticals LP was the largest of 32 companies reporting payments in 2025, $1,908 in all, mostly food and beverage. Lists Advocate Christ Hospital & Medical Center as a hospital affiliation.
Overview
| NPI | 1134148091 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD, PH.D |
| Sole proprietor | No |
| NPI issued | Jul 19, 2006 |
| Last updated in NPPES | Jul 26, 2019 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 036091528 | IL |
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 - Hematology/Oncology (IL) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 226 |
|---|---|
| Services billed | 14,909 across 60 procedure codes |
| Paid by Medicare | $354,654 |
Part D prescriptions in 2024
| Prescriptions (claims) | 758 · 1,108 30-day fills |
|---|---|
| Patients | 125 |
| Total drug cost | $2,191,721 |
| Generic share | 79% of claims |
Education and affiliations
| Graduation year | 1979 |
|---|---|
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Internal Medicine |
Medical group
- Affiliated Oncologists LLCMokena, IL · 44 clinicians
Hospital affiliation
- Advocate Christ Hospital & Medical CenterOak Lawn, IL
Industry payments (Open Payments)
- 2025$1,908 · 82 payments from 32 companies
- 2024$1,352 · 62 payments from 30 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $226.22 | 12 |
| Novartis Pharmaceuticals Corporation | $165.32 | 8 |
| Regeneron Healthcare Solutions, Inc. | $113.81 | 4 |
| Abbvie Inc. | $106.84 | 5 |
| Merck Sharp & Dohme LLC | $102.04 | 5 |
What the 2025 payments were for
- Food and Beverage$1,908 · 82 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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