Marisa Isaacson, MD
Gastroenterology · Clairton, PANPI 1588050827
Payments from drug & device makers
What this record shows
Almost everything reported here is food and beverage — 95.3% of the total across 89 separate payments, which is the pattern of a clinician who attends manufacturer presentations rather than one with a consulting arrangement. 15 manufacturers reported payments, led by AbbVie at 34.0% of the total. Reporting peaked in 2023 at $732 and has fallen 68.9% since, to $227 in 2025. That places this record below the midpoint for gastroenterology clinicians in PA, where the typical reported total is $1,806.
Across 89 payments — averaging $19.88 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.
- AbbVie$601
- Takeda Pharmaceuticals U.S.A., Inc.$390
- Johnson & Johnson$318
- Ardelyx, Inc.$143
- Pfizer$55
- Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$42
- plus $219 from 9 others
What the payments were for
- Food & beverage$1,68595%
- Education$845%
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 |
|---|---|---|
| AbbVie | 32 | $601 |
| Takeda Pharmaceuticals U.S.A., Inc. | 16 | $390 |
| Johnson & Johnson | 18 | $318 |
| Ardelyx, Inc. | 6 | $143 |
| Pfizer | 3 | $55 |
| Salix Pharmaceuticals, A Division Of Bausch Health US, LLC | 2 | $42 |
| Sanofi | 2 | $42 |
| Braintree Laboratories, Inc. | 2 | $35 |
| Bristol Myers Squibb | 2 | $30 |
| Intercept Pharmaceuticals, Inc. | 1 | $23 |
| Medtronic | 1 | $22 |
| Vertex | 1 | $18 |
| Organon | 1 | $18 |
| Ironwood Pharmaceuticals, Inc | 1 | $16 |
| Merck | 1 | $15 |
How this compares
$1,769 in reported general payments places this provider in the 45th 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 | 59 | $1,629,399 |
| LinzessLinaclotide | 63 | $44,802 |
| Sod Sulf-Potass Sulf-Mag SulfSodium, Potassium,mag Sulfates | 155 | $10,860 |
| Lubiprostone | 37 | $3,853 |
| SutabSod Sulf/Pot Chloride/Mag Sulf | 12 | $1,906 |
| Pantoprazole Sodium | 250 | $1,702 |
| Esomeprazole Magnesium | 29 | $1,555 |
| Omeprazole | 94 | $1,091 |
| Colestipol Hcl | 16 | $1,088 |
| Sulfasalazine DrSulfasalazine | 12 | $1,023 |
| Gavilyte-GPeg3350/Sod Sulf,bicarb,cl/Kcl | 77 | $878 |
| Gavilyte-CPeg3350/Sod Sulf,bicarb,cl/Kcl | 42 | $789 |
| CholestyramineCholestyramine (With Sugar) | 11 | $625 |
| Diphenoxylate-AtropineDiphenoxylate Hcl/Atropine | 19 | $530 |
| Sulfasalazine | 11 | $455 |
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 | $318 | $1,629,39959 claims |
| AbbVieLinzess | $601 | $44,80263 claims |
| Braintree Laboratories, Inc.Sutab | $35 | $1,90612 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 45th percentile of 935 gastroenterology providers in Pennsylvania.
Other gastroenterology in Clairton
- Miguel RegueiroPittsburgh$1.5M
- Adam PeytonAllentown$985K
- Shahin RahimianWaynesboro$592K
- Sandra El-HachemPittsburgh$472K
- Harshit KharaDanville$438K
- Kofi ClarkeHershey$426K
- Michael KochmanPhiladelphia$361K
- Gary LichtensteinPhiladelphia$342K
- Elie AounPittsburgh$323K
- Andrew TinsleyHershey$322K
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.