Brad Marder
Nephrology · Denver, CONPI 1487636775
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $54,492 of the $76,944 with a category attached, or 70.8%. Amgen accounts for 87.2% of it on its own, with 3 other manufacturers making up the rest. Among nephrology clinicians in CO 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 82 payments — averaging $938.34 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Amgen$67K
- Travere Therapeutics, Inc.$10K
- Nxstage Medical, Inc.$73
- AstraZeneca$20
Across 67 payments — averaging $3055.23 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.
- Travere Therapeutics, Inc.$134K
- GSK$33K
- E.r. Squibb & Sons, L.L.C.$26K
- Alnylam Pharmaceuticals Inc.$8K
- AbbVie$3K
- EMD Serono, Inc.$508
What the payments were for
- Consulting fees$8,20011%
- Speaking & faculty fees$54,49271%
- Travel & lodging$13,05517%
- Food & beverage$1,1962%
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 | 66 | $67,069 |
| Travere Therapeutics, Inc. | 14 | $9,781 |
| Nxstage Medical, Inc. | 1 | $73 |
| AstraZeneca | 1 | $20 |
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.
- KRYSTEXXA$66,564
How this compares
$76,944 in reported general payments places this provider in the 95th percentile of 152 nephrology providers in Colorado.
Other nephrology in Denver
- Laura KooiengaDenver$82K
- Maria VelezDenver$47K
- Jessica KendrickDenver$20K
- Bijan RoshanDenver$8K
- Michael ShapiroDenver$6K
- James DylewskiDenver$4K
- Rachita PrakashDenver$3K
- Elizabeth KernDenver$2K
- Kajal RaoDenver$1K
- Geoffrey BlockLone Tree$726K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.