Steven Gruber, MD
Nephrology · New York, NYNPI 1720024136
Payments from drug & device makers
What this record shows
The money is spread across several categories — food and beverage (53.2%), speaking fees and education — rather than concentrated in one kind of arrangement. Vifor Pharma, Inc. accounts for 61.4% of it on its own, with 6 other manufacturers making up the rest. Reporting peaked in 2021 at $249 and has fallen 94.0% since, to $15 in 2025. That places this record below the midpoint for nephrology clinicians in NY, where the typical reported total is $564.
Across 12 payments — averaging $39.16 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Vifor Pharma, Inc.$288
- Bayer$56
- Amgen$41
- GSK$26
- Ardelyx, Inc.$24
- Aurinia Pharma U.S., Inc.$20
- plus $15 from 1 others
What the payments were for
- Speaking & faculty fees$20043%
- Food & beverage$25053%
- Education$204%
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 |
|---|---|---|
| Vifor Pharma, Inc. | 4 | $288 |
| Bayer | 2 | $56 |
| Amgen(2 entities) | 2 | $41 |
| GSK | 1 | $26 |
| Ardelyx, Inc. | 1 | $24 |
| Aurinia Pharma U.S., Inc. | 1 | $20 |
| Calliditas Therapeutics US 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.
- Veltassa$200
How this compares
$470 in reported general payments places this provider in the 45th percentile of 935 nephrology providers in New York.
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.
Most prescribed under Part D
| Drug | Claims | Cost to plans & patients |
|---|---|---|
| XphozahTenapanor Hcl | 11 | $36,370 |
| JardianceEmpagliflozin | 18 | $26,487 |
| LokelmaSodium Zirconium Cyclosilicate | 19 | $21,096 |
| Lanthanum Carbonate | 16 | $10,842 |
| Potassium Citrate ErPotassium Citrate | 78 | $10,097 |
| Calcitriol | 440 | $9,501 |
| Sevelamer Carbonate | 47 | $9,080 |
| Nifedipine ErNifedipine | 253 | $8,375 |
| Mycophenolate Mofetil | 18 | $3,147 |
| Chlorthalidone | 105 | $2,293 |
| Metoprolol Succinate | 97 | $1,739 |
| Labetalol Hcl | 28 | $1,675 |
| Tacrolimus | 11 | $1,590 |
| Atorvastatin Calcium | 147 | $1,455 |
| Calcium Acetate | 28 | $1,154 |
Paid to pharmacies, not to this prescriber.
Other nephrology in New York
- Gerald AppelNew York$842K
- Richard ChanNew York$514K
- Steven CocaNew York$445K
- Jai RadhakrishnanNew York$369K
- Girish NadkarniNew York$281K
- James ChevalierNew York$202K
- David CharytanNew York$164K
- Kirk CampbellNew York$152K
- Andrew BombackNew York$106K
- Alan PerlmanNew York$101K
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.