Jun Frank Sun, M.D.
NPI 1306097209ActiveIndividual· Internal Medicine, Hematology & Oncology· Clinton, MD
Internal Medicine, Hematology & Oncology (M.D.) in Clinton, Maryland, trained at State University of New York at Buffalo School of Medicine (class of 2005). In 2024 Medicare paid $3,507,784 for 954 patients, and Part D covered 1,111 of their prescriptions, 61% of them generic. Karyopharm Therapeutics Inc. was the largest of 44 companies reporting payments in 2025, $5,309 in all, mostly food and beverage.
Overview
| NPI | 1306097209 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Oct 9, 2008 |
| Last updated in NPPES | Aug 18, 2011 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Internal Medicine, Hematology & Oncology Primary | 207RH0003X | D71785 | MD |
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 (DC); Practitioner - Medical Oncology (MD) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 954 |
|---|---|
| Services billed | 233,651 across 173 procedure codes |
| Paid by Medicare | $3,507,784 |
Part D prescriptions in 2024
| Prescriptions (claims) | 1,111 · 1,654 30-day fills |
|---|---|
| Patients | 185 |
| Total drug cost | $3,624,823 |
| Generic share | 61% of claims |
Education and affiliations
| Medical school | State University of New York at Buffalo School of Medicine |
|---|---|
| Graduation year | 2005 |
| Medicare specialty | Medical Oncology |
| Secondary specialties | Hematology |
| Telehealth | Offers telehealth |
Medical group
- Maryland Oncology Hematology PAColumbia, MD · 104 clinicians
Hospital affiliations
- Luminis Health Doctors Community Medical Ctr, IncLanham, MD
- University of MD Capital Region Medical CenterUpper Marlboro, MD
- University of MD Charles Regional Medical CenterLa Plata, MD
Industry payments (Open Payments)
- 2025$5,309 · 114 payments from 44 companies
- 2024$7,415 · 143 payments from 50 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Karyopharm Therapeutics Inc. | $2,649 | 4 |
| Pfizer Inc. | $331.51 | 12 |
| Merck Sharp & Dohme LLC | $256.48 | 11 |
| Janssen Biotech, Inc. | $196.78 | 10 |
| Astrazeneca Pharmaceuticals LP | $164.64 | 7 |
What the 2025 payments were for
- Food and Beverage$2,660 · 110 payments
- Consulting Fee$2,649 · 4 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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