RxDoctor Payments Data

Anshuman Chawla, MD

Gastroenterology · Downers Grove, ILNPI 1841276417

Payments from drug & device makers

$56,231in general payments, 2019–2025

Across 1,123 payments — averaging $50.07 each. Meals, travel, consulting and speaking fees, gifts and royalties reported by drug and device makers.

  • Phathom Pharmaceuticals, Inc.$34K
  • AbbVie$4K
  • Takeda Pharmaceuticals U.S.A., Inc.$3K
  • Johnson & Johnson$3K
  • Salix Pharmaceuticals, A Division Of Bausch Health US, LLC$2K
  • Gilead$1K
  • plus $9K from 40 others

What the payments were for

  • Consulting fees$8752%
  • Speaking & faculty fees$28,00050%
  • Travel & lodging$4,5088%
  • Food & beverage$22,64640%
  • Education$1620%
  • Gifts$400%

General payments by program year

19
20
21
22
23
24
25

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.

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

$56,231 in reported general payments places this provider in the 85th percentile of 787 gastroenterology providers in Illinois.

See all gastroenterology providers in Illinois

Medicare billing

Part B allowed, 2024
$118,904
Medicare patients
389
Services billed
874

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

DrugClaimsCost to plans & patients
ZenpepLipase/Protease/Amylase16$33,597
Mesalamine31$17,604
LinzessLinaclotide20$14,374
Sod Sulf-Potass Sulf-Mag SulfSodium, Potassium,mag Sulfates173$11,174
Ursodiol27$3,625
Omeprazole268$2,724
Azathioprine20$1,998
Esomeprazole Magnesium12$1,645
Pantoprazole Sodium120$1,548
Sucralfate17$1,020
Gavilyte-CPeg3350/Sod Sulf,bicarb,cl/Kcl31$478
Gavilyte-GPeg3350/Sod Sulf,bicarb,cl/Kcl17$277
Peg-3350 And ElectrolytesPeg3350/Sod Sulf,bicarb,cl/Kcl13$209
Diphenoxylate-AtropineDiphenoxylate Hcl/Atropine11$113

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.

CompanyPaid to this providerPart D cost of their drugs
Aimmune Therapeutics, Inc.Zenpep$426$33,59716 claims
AbbVieLinzess$4,381$14,37420 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 85th percentile of 787 gastroenterology providers in Illinois.

Other gastroenterology in Downers Grove

See the full list for Illinois

Where these figures come from

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