Aaron Mendelson, MD
Gastroenterology · Allentown, PANPI 1235499898
Payments from drug & device makers
What this record shows
This record is dominated by speaking fees: $65,664 of the $75,121 with a category attached, or 87.4%. E.r. Squibb & Sons, L.L.C. accounts for 93.5% of it on its own, with 11 other manufacturers making up the rest. Reporting peaked in 2021 at $29,463 and has fallen 74.7% since, to $7,461 in 2024. Among gastroenterology clinicians in PA with any reported payments, this total sits in the top 5% — high for the specialty, which is a reason to read the composition above rather than the number alone.
Across 78 payments — averaging $963.09 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- E.r. Squibb & Sons, L.L.C.$70K
- AbbVie$2K
- Bristol Myers Squibb$1K
- Ardelyx, Inc.$1K
- Takeda Pharmaceuticals U.S.A., Inc.$266
- Pfizer$125
- plus $201 from 6 others
Across 1 payment — averaging $127,645 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.
- Pfizer$128K
What the payments were for
- Consulting fees$4,6006%
- Speaking & faculty fees$65,66487%
- Travel & lodging$2,1213%
- Food & beverage$2,7334%
- Education$30%
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 |
|---|---|---|
| E.r. Squibb & Sons, L.L.C. | 52 | $70,237 |
| AbbVie | 1 | $1,800 |
| Bristol Myers Squibb | 13 | $1,492 |
| Ardelyx, Inc. | 1 | $1,000 |
| Takeda Pharmaceuticals U.S.A., Inc. | 3 | $266 |
| Pfizer | 1 | $125 |
| Medtronic | 2 | $105 |
| Shire North American Group Inc | 1 | $28 |
| Lilly USA, LLC | 1 | $21 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 1 | $19 |
| Ferring Pharmaceuticals Inc. | 1 | $14 |
| Johnson & Johnson | 1 | $13 |
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
$75,121 in reported general payments places this provider in the 95th percentile of 935 gastroenterology providers in Pennsylvania.
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 |
|---|---|---|
| StelaraUstekinumab | 23 | $655,115 |
| Skyrizi On-BodyRisankizumab-Rzaa | 21 | $406,991 |
| Cimzia (2 Pack)Certolizumab Pegol | 12 | $157,085 |
| CreonLipase/Protease/Amylase | 38 | $155,749 |
| Dupixent PenDupilumab | 11 | $97,056 |
| LinzessLinaclotide | 28 | $14,503 |
| Mesalamine | 19 | $9,402 |
| Budesonide EcBudesonide | 15 | $4,357 |
| Mesalamine ErMesalamine | 15 | $3,113 |
| Omeprazole | 206 | $2,927 |
| Sod Sulf-Potass Sulf-Mag SulfSodium, Potassium,mag Sulfates | 42 | $2,518 |
| Dexlansoprazole DrDexlansoprazole | 17 | $2,504 |
| Lubiprostone | 19 | $2,290 |
| Pantoprazole Sodium | 142 | $2,199 |
| Esomeprazole Magnesium | 37 | $1,357 |
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 |
|---|---|---|
| Johnson & JohnsonStelara | $13 | $655,11523 claims |
| AbbVieCreon, Linzess | $1,800 | $170,25266 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. Against peers, this provider's reported payments sit in the 95th percentile of 935 gastroenterology providers in Pennsylvania.
Other gastroenterology in Allentown
- Adam PeytonAllentown$985K
- Shashin ShahAllentown$162K
- Michael EngelsAllentown$111K
- Hiral ShahAllentown$76K
- Miguel RegueiroPittsburgh$1.5M
- Shahin RahimianWaynesboro$592K
- Sandra El-HachemPittsburgh$472K
- Harshit KharaDanville$438K
- Kofi ClarkeHershey$426K
- Michael KochmanPhiladelphia$361K
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.