Mark F. Kozloff, MD
NPI 1134166879ActiveIndividual· Internal Medicine, Hematology & Oncology· Harvey, IL
Internal Medicine, Hematology & Oncology (MD) in Harvey, Illinois, licensed in IL and IN, with an NPI issued in June 2006. Their prescriptions cost Medicare Part D more than their services did: $797,136 for 287 claims, against $119,522 paid for services in 2024. Celgene Corporation was the largest of 25 companies reporting payments in 2025, $2,134 in all, mostly food and beverage.
Overview
| NPI | 1134166879 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | MD |
| Sole proprietor | No |
| NPI issued | Jun 1, 2006 |
| Last updated in NPPES | Sep 25, 2018 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | IL036047581 | IL |
| Internal Medicine, Hematology & Oncology | 207RH0003X | 01038049A | IN |
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 | 329 |
|---|---|
| Services billed | 1,879 across 18 procedure codes |
| Paid by Medicare | $119,522 |
Part D prescriptions in 2024
| Prescriptions (claims) | 287 · 410 30-day fills |
|---|---|
| Patients | 78 |
| Total drug cost | $797,136 |
| Generic share | 74% of claims |
Industry payments (Open Payments)
- 2025$2,134 · 81 payments from 25 companies
- 2024$4,395 · 176 payments from 32 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Celgene Corporation | $491.54 | 6 |
| Astrazeneca Pharmaceuticals LP | $258.74 | 8 |
| Daiichi Sankyo Inc. | $172.72 | 8 |
| Novartis Pharmaceuticals Corporation | $141.99 | 11 |
| Genentech USA, Inc. | $109.19 | 5 |
What the 2025 payments were for
- Food and Beverage$2,134 · 81 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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