Mario Belledonne
Nephrology · Potomac, MDNPI 1033129457
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 100.0% of the total across 7 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 5 manufacturers reported payments, led by Amgen at 57.7% of the total. Reporting peaked in 2019 at $180 and has fallen 76.4% since, to $42 in 2022. That places this record below the midpoint for nephrology clinicians in MD, where the typical reported total is $552.
Across 7 payments — averaging $33.73 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Amgen$136
- AstraZeneca$44
- Merck$31
- Vifor Pharma, Inc.$13
- Biohaven Pharmaceutical Holding Company Ltd.$12
Across 222 payments — averaging $3218.68 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.
- GSK$624K
- AstraZeneca$90K
- Merck$169
What the payments were for
- Food & beverage$236100%
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 |
|---|---|---|
| Amgen | 2 | $136 |
| AstraZeneca | 1 | $44 |
| Merck | 2 | $31 |
| Vifor Pharma, Inc. | 1 | $13 |
| Biohaven Pharmaceutical Holding Company Ltd. | 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.
- Repatha$122
How this compares
$236 in reported general payments places this provider in the 35th percentile of 285 nephrology providers in Maryland.
Other nephrology in Potomac
- Kiran SamindlaFrederick$491K
- Matthew WeirBaltimore$490K
- Chirag ParikhBaltimore$186K
- Mohamad HanounehBaltimore$174K
- Daniel BrennanBaltimore$133K
- Monika DhillonBaltimore$126K
- Duvuru GeethaBaltimore$91K
- Eli RozaHagerstown$79K
- Mohamed AttaBaltimore$65K
- Michelle EstrellaBaltimore$55K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.