Joe Chang, PhD
Radiation Oncology · Houston, TXNPI 1205929361
Payments from drug & device makers
What this record shows
The money is spread across several categories — consulting fees (54.1%), speaking fees and travel and lodging — rather than concentrated in one kind of arrangement. 12 manufacturers reported payments, led by AstraZeneca at 55.9% of the total. Reporting peaked in 2019 at $22,873 and has fallen 99.2% since, to $191 in 2025. Among radiation oncology clinicians in TX with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 38 payments — averaging $1309.86 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AstraZeneca$28K
- Varian Medical Systems, Inc.$12K
- Siemens Medical Solutions USA, Inc.$4K
- Ion Beam Applications S.A.$3K
- IBA Proton Therapy, Inc.$2K
- Astrazeneca UK Limited$269
- plus $717 from 6 others
Across 5 payments — averaging $239,939 each. Payments tied to a research study. These frequently flow through the physician to a hospital or research institution rather than to the physician personally.
- AstraZeneca$1.1M
- E.r. Squibb & Sons, L.L.C.$91K
What the payments were for
- Consulting fees$26,94654%
- Speaking & faculty fees$16,67433%
- Travel & lodging$4,78610%
- Food & beverage$1,3683%
General payments by program year
Who reported the general payments
Companies are grouped under their corporate parent — a single manufacturer often files under several CMS reporting entities. Research and ownership payments are counted separately and are not in this table.
| Company | Payments | Total |
|---|---|---|
| AstraZeneca | 13 | $27,810 |
| Varian Medical Systems, Inc. | 8 | $12,137 |
| Siemens Medical Solutions USA, Inc. | 4 | $4,167 |
| Ion Beam Applications S.A. | 1 | $3,000 |
| IBA Proton Therapy, Inc. | 1 | $1,674 |
| Astrazeneca UK Limited | 2 | $269 |
| Novocure Inc. | 2 | $269 |
| Regeneron | 2 | $182 |
| Cochlear Americas | 1 | $138 |
| E.r. Squibb & Sons, L.L.C. | 1 | $53 |
| Genentech, Inc. | 1 | $38 |
| GE HealthCare | 2 | $37 |
What the payments were tied to
Products named in the reported payments. Only payments of $100 or more are attributed here — the typical reported payment nationally is a meal worth about $16, and listing those product-by-product would be noise.
- IMFINZI$21,069
- Varian Treatment$4,000
- Clinac$2,188
- ProBeam$2,000
- OPTUNE LUA (NOVOTTF-200T)$158
- Cochlear Nucleus CI632 cochlear implant with Slim Modiolar electrode$138
- Baha$138
- OSIA OSI300 IMPLANT$138
- LIBTAYO$122
- TAGRISSO$114
- Optune$110
How this compares
$49,775 in reported general payments places this provider in the 95th percentile of 418 radiation oncology providers in Texas.
Medicare billing
What this is not: this is the amount Original Medicare Part B allowed for services this provider billed in 2024. It is not their income. It excludes Medicare Advantage — now more than half of all Medicare enrollment — along with Medicaid and all commercial insurance, and it is gross practice revenue before staff, rent, supplies and malpractice premiums. CMS also suppresses any figure covering ten or fewer patients, so low-volume providers appear smaller than they are.
Other radiation oncology in Houston
- James WelshHouston$421K
- Stephen ChunHouston$344K
- Chad TangHouston$183K
- Phuoc TranHouston$177K
- Steven LinHouston$105K
- Benjamin SchrankHouston$100K
- Abhilasha PatelHouston$76K
- Daniel GomezHouston$47K
- David RosenthalHouston$40K
- Andrew FarachHouston$36K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Billing: Medicare Physician & Other Practitioners, data year 2024. Original Medicare Part B only.
- Identity: NPPES NPI Registry, July 2026.