Stephen G. Chun, M.D.
NPI 1659682656ActiveIndividual· Radiology, Radiation Oncology· Houston, TX
Radiology, Radiation Oncology (M.D.) with Physicians Referral Service, practicing in Houston, Texas. 175 Medicare patients in 2024, $134,896 paid; nearly all of their 106 Part D prescriptions were generic (97%). Astrazeneca Pharmaceuticals LP was the largest of 3 companies reporting payments in 2025, $152,415 in all, mostly speaking and faculty fees.
Overview
| NPI | 1659682656 |
|---|---|
| Status | Active |
| Entity type | Individual |
| Credential | M.D. |
| Sole proprietor | No |
| NPI issued | Jun 24, 2010 |
| Last updated in NPPES | Nov 6, 2020 |
| Certified by provider | Nov 6, 2020 |
Specialties and licenses
| Taxonomy | Code | License | State |
|---|---|---|---|
| Radiology, Radiation Oncology Primary | 2085R0001X | Q4071 | TX |
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 - Radiation Oncology (TX) |
|---|---|
| Accepts assignment | Yes (participating) |
Medicare services in 2024
| Medicare patients | 175 |
|---|---|
| Services billed | 2,050 across 28 procedure codes |
| Paid by Medicare | $134,896 |
Part D prescriptions in 2024
| Prescriptions (claims) | 106 · 116 30-day fills |
|---|---|
| Patients | 55 |
| Total drug cost | $2,443 |
| Generic share | 97% of claims |
Education and affiliations
| Graduation year | 2010 |
|---|---|
| Medicare specialty | Radiation Oncology |
| Telehealth | Offers telehealth |
Medical group
- Physicians Referral ServiceHouston, TX · 2,765 clinicians
Industry payments (Open Payments)
- 2025$152,415 · 109 payments from 3 companies
- 2024$72,813 · 75 payments from 3 companies
Top paying companies in 2025
| Company | Amount | Payments |
|---|---|---|
| Astrazeneca Pharmaceuticals LP | $119,415 | 82 |
| Novocure Inc. | $32,934 | 26 |
| Elekta, Inc. | $65.55 | 1 |
What the 2025 payments were for
- Compensation for services other than consulting, including serving as faculty or as a speaker at a venue other than a continuing education program$102,470 · 16 payments
- Compensation for serving as faculty or as a speaker for a medical education program$22,125 · 7 payments
- Travel and Lodging$13,108 · 38 payments
- Consulting Fee$5,890 · 2 payments
- Honoraria$5,625 · 2 payments
- Food and Beverage$3,197 · 44 payments
Receiving payments does not imply wrongdoing. What Open Payments covers ·original records
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