Donald Leung
Allergy & Immunology · Denver, CONPI 1215012950
Payments from drug & device makers
What this record shows
This record is dominated by consulting fees: $149,655 of the $207,566 with a category attached, or 72.1%. Sanofi accounts for 77.5% of it on its own, with 15 other manufacturers making up the rest. Among allergy & immunology clinicians in CO with any reported payments, this total sits in the top 10% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 107 payments — averaging $1939.87 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- Sanofi$161K
- LEO Pharma Inc.$18K
- Boehringer Ingelheim$8K
- Boehringer Ingelheim International GmbH$6K
- Genentech, Inc.$3K
- Pfizer$3K
- plus $9K from 10 others
Across 185 payments — averaging $17,920 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$1.7M
- Sanofi$1.1M
- Genentech, Inc.$216K
- Incyte Corporation$206K
- Mirum Pharmaceuticals, Inc.$60K
- Pfizer$37K
- plus $6K from 1 others
What the payments were for
- Consulting fees$149,65572%
- Speaking & faculty fees$3,1722%
- Travel & lodging$52,37125%
- Food & beverage$2,3411%
- Education$280%
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 | 53 | $160,839 |
| LEO Pharma Inc. | 7 | $17,970 |
| Boehringer Ingelheim | 9 | $7,848 |
| Boehringer Ingelheim International GmbH | 4 | $5,672 |
| Genentech, Inc. | 3 | $3,479 |
| Pfizer | 3 | $2,833 |
| Incyte Corporation | 1 | $2,455 |
| Janssen Research & Development, LLC | 2 | $2,100 |
| Aimmune Therapeutics, Inc. | 3 | $1,875 |
| Novartis | 1 | $1,308 |
| AbbVie | 6 | $728 |
| Johnson & Johnson Vision Care, Inc. | 11 | $264 |
| Regeneron | 1 | $90 |
| Sanofi-aventis U.S. LLC | 1 | $58 |
| Amgen | 1 | $29 |
| Teva Pharmaceuticals USA, Inc. | 1 | $18 |
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.
How this compares
$207,566 in reported general payments places this provider in the 90th percentile of 89 allergy & immunology providers in Colorado.
Other allergy & immunology in Denver
- Rohit KatialDenver$758K
- Eileen WangDenver$274K
- Flavia HoyteDenver$70K
- Bruce LanserDenver$34K
- Shaila GogateDenver$21K
- Harold NelsonDenver$14K
- Anna MeyerDenver$9K
- Monica ReddyDenver$6K
- Jessica HuiDenver$5K
- Ronina CovarDenver$5K
Where these figures come from
- Payments: CMS Open Payments, program years 2019–2025 (publication P06302026_06032026).
- Identity: NPPES NPI Registry, July 2026.