Thomas Kenkel
Nephrology · Tulsa, OKNPI 1558437624
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 98.3% of the total across 214 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. It is spread thinly across 25 manufacturers, the largest accounting for just 19.8% — the pattern of someone who eats at a lot of different presentations. Reporting peaked in 2021 at $1,812 and has fallen 91.1% since, to $162 in 2022.
Across 214 payments — averaging $17.77 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AstraZeneca$752
- Fresenius USA Marketing, Inc.$571
- Amgen$396
- Otsuka America Pharmaceutical, Inc.$303
- Mallinckrodt Hospital Products Inc.$289
- Vifor Pharma, Inc.$278
- plus $1K from 19 others
What the payments were for
- Food & beverage$3,73998%
- Education$632%
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) | 39 | $752 |
| Fresenius USA Marketing, Inc. | 49 | $571 |
| Amgen(2 entities) | 19 | $396 |
| Otsuka America Pharmaceutical, Inc. | 16 | $303 |
| Mallinckrodt Hospital Products Inc. | 14 | $289 |
| Vifor Pharma, Inc. | 14 | $278 |
| Akebia Therapeutics Inc | 10 | $202 |
| Daiichi Sankyo Inc. | 9 | $189 |
| Veloxis Pharmaceuticals, Inc. | 6 | $145 |
| OPKO Pharmaceuticals, LLC | 8 | $143 |
| Novo Nordisk | 3 | $67 |
| GSK | 4 | $63 |
| Takeda Pharmaceuticals U.S.A., Inc. | 3 | $63 |
| AbbVie(2 entities) | 3 | $48 |
| Genentech USA, Inc. | 3 | $47 |
| Angiodynamics, Inc. | 2 | $40 |
| Johnson & Johnson | 3 | $37 |
| Bayer | 2 | $35 |
| Shire North American Group Inc | 1 | $26 |
| Pharmacosmos Therapeutics Inc. | 1 | $24 |
| Ultragenyx Pharmaceutical Inc. | 1 | $22 |
| Arbor Pharmaceuticals, Inc. | 1 | $18 |
| Medtronic | 1 | $16 |
| Aurinia Pharma U.S., Inc. | 1 | $15 |
| W. L. Gore & Associates, Inc. | 1 | $13 |
How this compares
$3,802 in reported general payments places this provider in the 65th percentile of 106 nephrology providers in Oklahoma.
Other nephrology in Tulsa
- Sunil AgrawalTulsa$40K
- Pranay KathuriaTulsa$21K
- Kevin FuTulsa$14K
- Diptesh GuptaTulsa$13K
- Janet RussellTulsa$12K
- Bobby MuthalalyTulsa$12K
- Narottam RegmiTulsa$12K
- Alpana PasrichaTulsa$9K
- Reza AzadiTulsa$9K
- Christine WilsonTulsa$8K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.