John Schwartz
Nephrology · Dallas, TXNPI 1770554180
Payments from drug & device makers
Across 80 payments — averaging $22.69 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AstraZeneca$538
- Nxstage Medical, Inc.$252
- Vifor Pharma, Inc.$155
- Fresenius USA Marketing, Inc.$140
- Otsuka America Pharmaceutical, Inc.$98
- Veloxis Pharmaceuticals, Inc.$85
- plus $547 from 15 others
What the payments were for
- Food & beverage$1,79899%
- Education$171%
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 |
|---|---|---|
| AstraZeneca(2 entities) | 30 | $538 |
| Nxstage Medical, Inc. | 3 | $252 |
| Vifor Pharma, Inc. | 7 | $155 |
| Fresenius USA Marketing, Inc. | 8 | $140 |
| Otsuka America Pharmaceutical, Inc. | 4 | $98 |
| Veloxis Pharmaceuticals, Inc. | 3 | $85 |
| Ardelyx, Inc. | 2 | $69 |
| Amgen | 3 | $66 |
| Johnson & Johnson | 4 | $64 |
| OPKO Pharmaceuticals, LLC | 3 | $54 |
| Mallinckrodt Enterprises LLC | 2 | $53 |
| Travere Therapeutics, Inc. | 2 | $37 |
| Calliditas Therapeutics US Inc. | 1 | $34 |
| Aurinia Pharma U.S., Inc. | 1 | $27 |
| Mallinckrodt Hospital Products Inc. | 1 | $27 |
| Alnylam Pharmaceuticals Inc. | 1 | $25 |
| Akebia Therapeutics Inc | 1 | $22 |
| Novartis | 1 | $22 |
| Boehringer Ingelheim | 1 | $17 |
| Bayer | 1 | $15 |
| Chiesi USA, 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.
- Concentrates$148
- LIBERTY SELECT CYCLER$148
How this compares
$1,816 in reported general payments places this provider in the 50th percentile of 1,070 nephrology providers in Texas.
Other nephrology in Dallas
- Ankit MehtaDallas$3M
- Irfan AghaDallas$3M
- David WojciechowskiDallas$1.6M
- Biff PalmerDallas$867K
- Gates ColbertDallas$828K
- Mark LermanDallas$564K
- Sumit KumarDallas$561K
- Robert TotoDallas$442K
- Akinwande AkinfolarinDallas$423K
- Deepa AmberkerDallas$300K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.