Benjamin Davis, MD
Allergy & Immunology · Iowa City, IANPI 1467616326
Payments from drug & device makers
What this record shows
This record is dominated by education: $137 of the $154 with a category attached, or 89.1%. Sanofi-aventis U.S. LLC accounts for 62.9% of it on its own, with 3 other manufacturers making up the rest. Reporting peaked in 2022 at $113 and has fallen 77.9% since, to $25 in 2025. That places this record below the midpoint for allergy & immunology clinicians in IA, where the typical reported total is $750.
Across 4 payments — averaging $38.38 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Sanofi-aventis U.S. LLC$97
- Ionis Pharmaceuticals, Inc.$25
- Bio Products Laboratory USA, Inc.$17
- Pfizer$15
Across 39 payments — averaging $2792.84 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.
- Regeneron$77K
- Novartis$32K
What the payments were for
- Food & beverage$1711%
- Education$13789%
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 |
|---|---|---|
| Sanofi-aventis U.S. LLC | 1 | $97 |
| Ionis Pharmaceuticals, Inc. | 1 | $25 |
| Bio Products Laboratory USA, Inc. | 1 | $17 |
| Pfizer | 1 | $15 |
How this compares
$154 in reported general payments places this provider in the 15th percentile of 32 allergy & immunology providers in Iowa.
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 |
|---|---|---|
| Dupixent SyringeDupilumab | 20 | $73,912 |
| Gamunex-CImmune Globul G/Gly/Iga Avg 46 | 12 | $41,326 |
| Arnuity ElliptaFluticasone Furoate | 11 | $2,302 |
| Azelastine Hcl | 37 | $1,256 |
| Montelukast Sodium | 29 | $592 |
| Albuterol Sulfate HfaAlbuterol Sulfate | 22 | $581 |
| Azithromycin | 19 | $276 |
| Fluticasone Propionate | 15 | $137 |
| Famotidine | 12 | $27 |
Paid to pharmacies, not to this prescriber.
Other allergy & immunology in Iowa City
- Erin RasmussenIowa City$1K
- Amir AbidovIowa City$448
- Zuhair BallasIowa City$255
- Shayna MelvaniIowa City$221
- Mary FasanoIowa City$74
- Jeffrey ZavalaIowa City$24
- Vuong NayimaWest Des Moines$34K
- Fadi AlkhatibWest Des Moines$16K
- Daniel HamilosMason City$11K
- Lyla SchweigerCedar Rapids$6K
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.