David Katzen, MD
Allergy · Warwick, RINPI 1093711830
Payments from drug & device makers
Across 238 payments — averaging $19.56 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AstraZeneca$1K
- GSK$952
- Sanofi$488
- Regeneron Healthcare Solutions, Inc.$441
- Genentech USA, Inc.$294
- Kaleo, Inc.$241
- plus $946 from 14 others
What the payments were for
- Food & beverage$4,655100%
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 | 67 | $1,293 |
| GSK | 54 | $952 |
| Sanofi | 20 | $488 |
| Regeneron Healthcare Solutions, Inc. | 16 | $441 |
| Genentech USA, Inc. | 21 | $294 |
| Kaleo, Inc. | 14 | $241 |
| Teva Pharmaceuticals USA, Inc. | 11 | $220 |
| Novartis | 9 | $178 |
| Amgen | 5 | $111 |
| Boehringer Ingelheim | 5 | $96 |
| Blueprint Medicines Corporation | 3 | $91 |
| Optinose US, Inc. | 2 | $49 |
| AbbVie | 2 | $47 |
| Covis Pharma GmbH | 2 | $37 |
| Pfizer | 2 | $30 |
| Hikma Pharmaceuticals USA | 1 | $25 |
| Eyevance Pharmaceuticals LLC | 1 | $17 |
| Incyte Corporation | 1 | $16 |
| LEO Pharma Inc. | 1 | $15 |
| Philips North America LLC | 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.
- TEZSPIRE$115
How this compares
Too few allergy providers in Rhode Islandto place this figure against a meaningful peer group, so we don't.
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 |
|---|---|---|
| XolairOmalizumab | 28 | $93,889 |
| Trelegy ElliptaFluticasone/Umeclidin/Vilanter | 79 | $54,280 |
| Breo ElliptaFluticasone/Vilanterol | 43 | $23,495 |
| Arnuity ElliptaFluticasone Furoate | 33 | $11,786 |
| Breztri AerosphereBudesonide/Glycopyr/Formoterol | 11 | $7,846 |
| Budesonide-Formoterol FumarateBudesonide/Formoterol Fumarate | 24 | $7,268 |
| Qvar RedihalerBeclomethasone Dipropionate | 28 | $7,066 |
| Epinephrine | 44 | $5,675 |
| Fluticasone Propionate | 227 | $4,625 |
| Azelastine Hcl | 120 | $4,503 |
| Advair HfaFluticasone Propion/Salmeterol | 13 | $4,352 |
| Pulmicort FlexhalerBudesonide | 17 | $4,297 |
| Fluticasone Propionate HfaFluticasone Propionate | 15 | $3,564 |
| Fluticasone-SalmeterolFluticasone Propion/Salmeterol | 18 | $3,419 |
| Albuterol Sulfate HfaAlbuterol Sulfate | 92 | $3,302 |
Paid to pharmacies, not to this prescriber.
Companies that both paid and supply prescribed drugs
These companies both reported payments to this provider and make drugs the provider prescribed under Medicare Part D in 2024. For most specialties this overlap is expected — a cardiologist who is paid by a cardiology drugmaker also treats heart disease. It is shown so the reader can see it, not because it implies anything on its own.
| Company | Paid to this provider | Part D cost of their drugs |
|---|---|---|
| GSKTrelegy Ellipta, Breo Ellipta, Arnuity Ellipta | $952 | $89,562155 claims |
| AstraZenecaBreztri Aerosphere, Pulmicort Flexhaler | $1,293 | $12,14328 claims |
| Teva Pharmaceuticals USA, Inc.Qvar Redihaler | $220 | $7,06628 claims |
| Hikma Pharmaceuticals USAEpinephrine | $25 | $5,67544 claims |
Reading this fairly. The Part D column is what drug plans and patients paid pharmacies — this provider received none of it, and it reflects how many patients they treat and what those drugs cost. There are too few allergy providers in Rhode Islandon file to place this against a meaningful peer group, so we don't.
Other allergy in Warwick
- John ZwetchkenbaumProvidence$1.4M
- Anthony RicciEast Greenwich$9K
- Mansi JamesProvidence$810
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.