Ayesha Siddiqi, MD
Allergy & Immunology · Chicago, ILNPI 1003878299
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 95.0% of the total across 133 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 14 manufacturers reported payments, led by GSK at 24.5% of the total. Reporting peaked in 2023 at $1,015 and has fallen 52.4% since, to $483 in 2025. That places this record below the midpoint for allergy & immunology clinicians in IL, where the typical reported total is $2,761.
Across 133 payments — averaging $23.98 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- GSK$781
- Sanofi$560
- AstraZeneca$497
- Regeneron Healthcare Solutions, Inc.$406
- Biocryst US Sales Co., LLC$220
- Sanofi-aventis U.S. LLC$160
- plus $566 from 8 others
Across 12 payments — averaging $3615.73 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.
- GSK$20K
- AstraZeneca$15K
- Novartis$9K
What the payments were for
- Food & beverage$3,02995%
- Education$1605%
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 |
|---|---|---|
| GSK | 40 | $781 |
| Sanofi | 25 | $560 |
| AstraZeneca | 15 | $497 |
| Regeneron Healthcare Solutions, Inc. | 19 | $406 |
| Biocryst US Sales Co., LLC | 11 | $220 |
| Sanofi-aventis U.S. LLC | 2 | $160 |
| Amgen | 3 | $156 |
| Alk-abello, Inc | 3 | $128 |
| CSL Behring | 5 | $88 |
| Novartis | 4 | $67 |
| Pfizer | 3 | $56 |
| Takeda Pharmaceuticals U.S.A., Inc. | 1 | $26 |
| Smith+Nephew | 1 | $25 |
| Merck | 1 | $19 |
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
$3,189 in reported general payments places this provider in the 50th percentile of 161 allergy & immunology providers in Illinois.
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 | 12 | $32,162 |
| Azelastine Hcl | 17 | $534 |
| Escitalopram Oxalate | 13 | $281 |
| Allopurinol | 12 | $265 |
| Fluticasone Propionate | 18 | $154 |
Paid to pharmacies, not to this prescriber.
Other allergy & immunology in Chicago
- Anju PetersChicago$563K
- Giselle MosnaimChicago$331K
- Amanda SalihChicago$160K
- Juanita MoraChicago$147K
- Christina CiaccioChicago$73K
- Michael FoggsChicago$71K
- Melanie MakhijaChicago$56K
- Whitney StevensChicago$34K
- Andrea Pappalardo WlochowiczChicago$33K
- Krishan ChhibaChicago$23K
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.