Ann Klopp, MD
Radiation Oncology · Houston, TXNPI 1356504419
Payments from drug & device makers
Across 20 payments — averaging $948.01 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Merck$8K
- EMD Serono, Inc.$4K
- Astrazeneca UK Limited$2K
- Boston Scientific$2K
- AstraZeneca$2K
- Boehringer Ingelheim$1K
- plus $152 from 2 others
What the payments were for
- Consulting fees$16,04385%
- Travel & lodging$2,49713%
- Food & beverage$4202%
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 |
|---|---|---|
| Merck | 7 | $7,589 |
| EMD Serono, Inc. | 2 | $4,207 |
| Astrazeneca UK Limited | 1 | $2,205 |
| Boston Scientific | 2 | $1,838 |
| AstraZeneca | 3 | $1,601 |
| Boehringer Ingelheim | 2 | $1,369 |
| Siemens Medical Solutions USA, Inc. | 2 | $93 |
| Elekta, Inc. | 1 | $59 |
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.
- SPACEOAR VUE$1,838
- LYNPARZA$1,510
- KEYTRUDA$552
How this compares
$18,960 in reported general payments places this provider in the 85th 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
- Daniel GomezHouston$8.7M
- Chad TangHouston$7.7M
- James WelshHouston$5.1M
- Caroline ChungHouston$3.7M
- Karen HoffmanHouston$2.6M
- Clifton FullerHouston$1.6M
- Steven LinHouston$1.5M
- Chenyang WangHouston$1.4M
- Joe ChangHouston$1.2M
- Lilie LinHouston$1.2M
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.