David Gershenson, MD
Gynecologic Oncology · Houston, TXNPI 1477651099
Payments from drug & device makers
What this record shows
The money is spread across several categories — consulting fees (42.5%), speaking fees and grants — rather than concentrated in one kind of arrangement. 6 manufacturers reported payments, led by Genentech, Inc. at 45.9% of the total.
Across 13 payments — averaging $597.65 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Genentech, Inc.$4K
- Aadi Bioscience, Inc.$2K
- AstraZeneca$2K
- Tesaro, Inc.$105
- Genentech USA, Inc.$85
- GSK$37
Across 8 payments — averaging $33,356 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.
- Novartis$265K
- F. Hoffmann-la Roche AG$2K
What the payments were for
- Consulting fees$3,30042%
- Speaking & faculty fees$2,20028%
- Grants$1,72222%
- Food & beverage$5487%
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 |
|---|---|---|
| Genentech, Inc. | 6 | $3,570 |
| Aadi Bioscience, Inc. | 2 | $2,250 |
| AstraZeneca | 2 | $1,722 |
| Tesaro, Inc. | 1 | $105 |
| Genentech USA, Inc. | 1 | $85 |
| GSK | 1 | $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.
How this compares
$7,769 in reported general payments places this provider in the 70th percentile of 135 gynecologic 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 gynecologic oncology in Houston
- Robert ColemanHouston$864K
- Maurie MarkmanHouston$204K
- Michael FrumovitzHouston$156K
- Aparna KamatHouston$116K
- Anuj SuriHouston$72K
- Anil SoodHouston$69K
- Pedro RamirezHouston$42K
- Pamela SolimanHouston$37K
- Anthony CostalesHouston$17K
- Travis SimsHouston$14K
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.