Leon Christopher Hwang, M.D.
NPI 1972659266ActiveIndividual· Internal Medicine, Hematology & Oncology· Rockville, MD
Internal Medicine, Hematology & Oncology (M.D.) in Rockville, Maryland, licensed in MD, with an NPI issued in January 2007. Their prescriptions cost Medicare Part D more than their services did: $5,811,233 for 2,422 claims, against $30,892 paid for services in 2024. Regeneron Healthcare Solutions, Inc. reported $17.02 in payments in 2025, mostly education.
Overview
| NPI | 1972659266 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jan 26, 2007 |
| Last updated in NPPES | Jan 19, 2022 |
| Certified by provider | Jan 19, 2022 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | D45880 | MD |
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 - Medical Oncology (DC) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 20 |
|---|---|
| Services billed | 1,546 across 27 procedure codes |
| Paid by Medicare | $30,892 |
Part D prescriptions in 2024
| Prescriptions (claims) | 2,422 · 3,814 30-day fills |
|---|---|
| Patients | 417 |
| Total drug cost | $5,811,233 |
| Generic share | 76% of claims |
Industry payments (Open Payments)
- 2025$17.02 · 1 payment from 1 company
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Regeneron Healthcare Solutions, Inc. | $17.02 | 1 |
What the 2025 payments were for
- Education$17.02 · 1 payment
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
Other hematologist-oncologists in Rockville
- 1013098870
- 1033290705
- 1104003342
- 1427074707
- 1689755365
- 1821291477
- 1972760452
- 1043305386
- 1255894879
- 1407011729
- 1437463700
- 1689207920
All 27 hematologist-oncologists in Rockville · All hematologist-oncologists in Maryland