Karthik Vadamalai, MD
Critical Care Medicine · Houston, TXNPI 1366881393
Payments from drug & device makers
What this record shows
The money is spread across several categories — travel and lodging (46.0%), food and beverage and speaking fees — rather than concentrated in one kind of arrangement. 4 manufacturers reported payments, led by Abiomed at 57.3% of the total. 2025 is the largest year on record at $247, 7.4 times the $33 reported in 2020. That places this record below the midpoint for critical care medicine clinicians in TX, where the typical reported total is $519.
Across 8 payments — averaging $48.39 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Abiomed$222
- Medtronic$82
- BD$50
- Portola Pharmaceuticals, LLC$33
Across 4 payments — averaging $1323.44 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.
- Takeda Pharmaceuticals U.S.A., Inc.$2K
- Omeros Corporation$2K
- Genentech, Inc.$1K
What the payments were for
- Speaking & faculty fees$5013%
- Travel & lodging$17846%
- Food & beverage$15941%
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 |
|---|---|---|
| Abiomed | 3 | $222 |
| Medtronic | 2 | $82 |
| BD | 2 | $50 |
| Portola Pharmaceuticals, LLC | 1 | $33 |
How this compares
$387 in reported general payments places this provider in the 45th percentile of 507 critical care medicine 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 critical care medicine in Houston
- Edwin ParsleyHouston$283K
- Bindu AkkantiHouston$185K
- Faisal MasudHouston$155K
- Sergio Trevino CastilloHouston$133K
- Sami HossriHouston$34K
- George WilliamsHouston$33K
- Nicholas VillalobosHouston$26K
- Ranjan UpadhyayHouston$25K
- Deepa GoturHouston$23K
- Hany Abd-El MalekHouston$19K
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.