Gregory McKenna, MD
Transplant Surgery · Dallas, TXNPI 1467489799
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $2,900 of the $4,227 with a category attached, or 68.6%. Calliditas Therapeutics US Inc. accounts for 68.6% of it on its own, with 7 other manufacturers making up the rest. 2025 is the largest year on record at $3,891, more than ten times the $20 reported in 2023.
Across 15 payments — averaging $281.78 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Calliditas Therapeutics US Inc.$3K
- Histosonics, Inc.$865
- Paragonix Technologies, Inc.$197
- Takeda Pharmaceuticals U.S.A., Inc.$108
- Merck$59
- One Lambda, Inc.$50
- plus $47 from 2 others
What the payments were for
- Consulting fees$2,90069%
- Travel & lodging$64015%
- Food & beverage$68616%
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 |
|---|---|---|
| Calliditas Therapeutics US Inc. | 1 | $2,900 |
| Histosonics, Inc. | 2 | $865 |
| Paragonix Technologies, Inc. | 1 | $197 |
| Takeda Pharmaceuticals U.S.A., Inc. | 5 | $108 |
| Merck | 3 | $59 |
| One Lambda, Inc. | 1 | $50 |
| Veloxis Pharmaceuticals, Inc. | 1 | $29 |
| Eurofins Viracor, LLC | 1 | $18 |
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.
- TARPEYO$2,900
- SherpaPak$197
- LIVERguard$197
- LUNGguard$197
- BaroGuard$197
- PancreasPak$197
How this compares
$4,227 in reported general payments places this provider in the 60th percentile of 70 transplant surgery 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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Valganciclovir Hcl | 35 | $5,249 |
| Sulfamethoxazole-TrimethoprimSulfamethoxazole/Trimethoprim | 28 | $95 |
Paid to pharmacies, not to this prescriber.
Other transplant surgery in Dallas
- Goran KlintmalmDallas$88K
- Alejandro MejiaDallas$20K
- Richard RuizDallas$16K
- Christie GoodenDallas$8K
- Steven HanishDallas$7K
- Lori KautzmanDallas$7K
- Jason SchwartzDallas$5K
- Tiffany AnthonyDallas$5K
- Anji WallDallas$4K
- Seung Hee LeeDallas$4K
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.