Joseph I. Clark, MD
NPI 1972580843ActiveIndividual· Internal Medicine, Hematology & Oncology· Maywood, IL
Internal Medicine, Hematology & Oncology (MD) in Maywood, Illinois, trained at Loyola University of Chicago, Stritch School of Medicine (class of 1989). Their prescriptions cost Medicare Part D more than their services did: $5,243,734 for 1,114 claims, against $73,946 paid for services in 2024.
Overview
| NPI | 1972580843 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Dec 30, 2005 |
| Last updated in NPPES | Jan 28, 2022 |
| Certified by provider | Jan 28, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | 36083048 | 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 4, 2026 | No match | — |
| New York OMIG · Nov 4, 2026 | No match | — |
| Ohio Medicaid · Nov 4, 2026 | No match | — |
| Pennsylvania Medicheck · Nov 4, 2026 | No match | — |
| Washington HCA · Nov 4, 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 | 340 |
|---|---|
| Services billed | 1,319 across 19 procedure codes |
| Paid by Medicare | $73,946 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,114 · 1,488 30-day fills |
|---|---|
| Patients | 169 |
| Total drug cost | $5,243,734 |
| Generic share | 64% of claims |
Education and affiliations
| Medical school | Loyola University of Chicago, Stritch School of Medicine |
|---|---|
| Graduation year | 1989 |
| Medicare specialty | Hematology/Oncology |
| Secondary specialties | Internal Medicine |
Medical group
- Loyola University Medical CenterMaywood, IL · 953 clinicians
Hospital affiliations
- Advocate Good Shepherd HospitalBarrington, IL
- Loyola Gottlieb Memorial HospitalMelrose Park, IL
- Loyola University Medical CenterMaywood, IL
- Macneal HospitalBerwyn, IL
Industry payments (Open Payments)
None reported for 2025 or 2024.
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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