Zachary Lambertsen, MD
Diagnostic Radiology · Little Rock, ARNPI 1770922882
Payments from drug & device makers
What this record shows
This record is dominated by food and beverage: $4,005 of the $5,967 with a category attached, or 67.1%. 13 manufacturers reported payments, led by Boston Scientific at 35.8% of the total. Reporting peaked in 2019 at $2,278 and has fallen 88.4% since, to $264 in 2025. Among diagnostic radiology clinicians in AR with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 44 payments — averaging $135.61 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Boston Scientific$2K
- Biocompatibles, Inc.$2K
- Inari Medical, Inc.$1K
- Terumo Medical Corporation$330
- Cook Medical LLC$213
- Bard Peripheral Vascular, Inc.$123
- plus $263 from 7 others
What the payments were for
- Grants$1723%
- Travel & lodging$1,79030%
- Food & beverage$4,00567%
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 |
|---|---|---|
| Boston Scientific | 9 | $2,135 |
| Biocompatibles, Inc. | 6 | $1,893 |
| Inari Medical, Inc. | 12 | $1,011 |
| Terumo Medical Corporation | 4 | $330 |
| Cook Medical LLC | 3 | $213 |
| Bard Peripheral Vascular, Inc. | 1 | $123 |
| Medtronic(2 entities) | 2 | $92 |
| Balt USA, LLC | 1 | $64 |
| Stryker | 2 | $39 |
| B. Braun Interventional Systems Inc. | 1 | $20 |
| Cardiva Medical, Inc. | 1 | $17 |
| Mozarc Medical US LLC | 1 | $16 |
| Angiodynamics, Inc. | 1 | $15 |
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
$5,967 in reported general payments places this provider in the 95th percentile of 240 diagnostic radiology providers in Arkansas.
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 diagnostic radiology in Little Rock
- Stacy Smith-FoleyLittle Rock$106K
- Harika TirumaniLittle Rock$98K
- Steven DunnaganLittle Rock$25K
- Raja ShaikhLittle Rock$11K
- Rahul JadhavLittle Rock$5K
- Satya PatroLittle Rock$5K
- Sumit ShahLittle Rock$3K
- Matthew McCraryLittle Rock$2K
- Mudassar KamranLittle Rock$2K
- Kedar JambhekarLittle Rock$2K
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.