Geoffrey Block
Nephrology · Lone Tree, CONPI 1861474140
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $707,962 of the $726,343 with a category attached, or 97.5%. Ardelyx, Inc. accounts for 73.2% of it on its own, with 10 other manufacturers making up the rest. Reporting peaked in 2023 at $526,030 and has fallen 97.1% since, to $15,218 in 2025. 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 51 payments — averaging $14,242 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Ardelyx, Inc.$532K
- Outset Medical Inc$173K
- Akebia Therapeutics Inc$9K
- Amgen$8K
- Kyowa Kirin Co., Ltd$4K
- Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$125
- plus $213 from 5 others
Across 122 payments — averaging $95,995 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.
- Akebia Therapeutics Inc$9.7M
- Bayer$1.1M
- GSK$884K
- Amgen$31K
- Omeros Corporation$29K
- AstraZeneca$12K
- plus $229 from 1 others
What the payments were for
- Consulting fees$707,96297%
- Speaking & faculty fees$15,0002%
- Travel & lodging$2,5990%
- Food & beverage$7820%
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 |
|---|---|---|
| Ardelyx, Inc. | 15 | $531,771 |
| Outset Medical Inc | 18 | $173,260 |
| Akebia Therapeutics Inc | 6 | $8,582 |
| Amgen | 3 | $8,040 |
| Kyowa Kirin Co., Ltd | 3 | $4,351 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 1 | $125 |
| Vertex | 1 | $73 |
| GSK | 1 | $64 |
| Shionogi Inc | 1 | $40 |
| AstraZeneca | 1 | $23 |
| ANI Pharmaceuticals, Inc. | 1 | $14 |
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
$726,343 in reported general payments places this provider in the 95th percentile of 152 nephrology providers in Colorado.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| Gabapentin | 12 | $123 |
| Losartan Potassium | 12 | $112 |
Paid to pharmacies, not to this prescriber.
Other nephrology in Lone Tree
- Gregory SchlessingerLone Tree$4K
- Michael RocklinLone Tree$2K
- Andrew BrookensLone Tree$2K
- Steven FabianLone Tree$1K
- Bruce FischLone Tree$1K
- Laura KooiengaDenver$82K
- Brad MarderDenver$77K
- Richard JohnsonAurora$62K
- Maria VelezDenver$47K
- Paul MillerGolden$42K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.