Ziad Al Adas, MD
Vascular Surgery · Nashville, TNNPI 1578053492
Payments from drug & device makers
What this record shows
The money is spread across several categories — food and beverage (51.5%), grants and travel and lodging — rather than concentrated in one kind of arrangement. 17 manufacturers reported payments, led by Cook Medical LLC at 46.4% of the total. Reporting peaked in 2022 at $3,301 and has fallen 56.6% since, to $1,434 in 2025.
Across 107 payments — averaging $86.26 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Cook Medical LLC$4K
- W. L. Gore & Associates, Inc.$2K
- Medtronic$515
- Endologix LLC$474
- Cook Incorporated$338
- Penumbra, Inc.$313
- plus $1K from 11 others
What the payments were for
- Grants$2,31625%
- Travel & lodging$1,20513%
- Food & beverage$4,75452%
- Education$95510%
Most of this is food and beverage — typically meals provided during product presentations at a clinic or hospital. Nationally that is the single largest category of reported payments by count.
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 |
|---|---|---|
| Cook Medical LLC | 42 | $4,281 |
| W. L. Gore & Associates, Inc. | 34 | $2,226 |
| Medtronic(2 entities) | 4 | $515 |
| Endologix LLC | 6 | $474 |
| Cook Incorporated | 1 | $338 |
| Penumbra, Inc. | 4 | $313 |
| Silk Road Medical, Inc. | 2 | $298 |
| Bolton Medical Inc | 3 | $152 |
| Medical Device Business Services, Inc. | 2 | $132 |
| AstraZeneca | 1 | $124 |
| Inari Medical, Inc. | 2 | $95 |
| Baxter Healthcare | 1 | $74 |
| Getinge USA Sales, LLC | 1 | $71 |
| Abbott | 1 | $55 |
| Stryker | 1 | $36 |
| Shockwave Medical, Inc | 1 | $35 |
| Lemaitre Vascular, Inc. | 1 | $12 |
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.
- Cook$569
- GORE EXCLUDER Thoracoabdominal Branch Endoprosthesis$522
- GORE VIABAHN VBX Balloon Expandable Endo$352
- ENROUTE Transcarotid Stent$298
- ENROUTE Transcarotid Neuroprotection System$298
- Zenith Spiral-Z$291
- Vascular Graft$259
- Lunderquist$254
- Indigo System$248
- EXCLUDER AAA Endoprosthesis$187
- GORE VIABAHN Endoprosthesis$186
- AFX2 Bifurcated Endograft System$145
- AFX$139
- Ovation$139
- Alto Abdominal Stent Graft System$134
- LOKELMA$124
- Endurant$123
- Zenith Alpha$113
- Cook Medical AFEN$111
- RELAY THORACIC STENT-GRAFT WITH PLUS DELIVERY SYSTEM$104
How this compares
$9,230 in reported general payments places this provider in the 60th percentile of 117 vascular surgery providers in Tennessee.
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 vascular surgery in Nashville
- Daniel ClairNashville$993K
- Patrick StoneNashville$46K
- Allen LeeNashville$39K
- Julia BollNashville$36K
- Thomas NaslundNashville$31K
- Lauren FryeNashville$20K
- Patrick RyanNashville$19K
- Jim Bob FaulkNashville$13K
- Mary NallyNashville$10K
- Sergio Sastriques DunlopNashville$10K
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.