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Gastroenterology in Chicago, Illinois

Data updated monthly · Last refresh September 2026

278 Gastroenterology providers practice in Chicago, and 57% received drug or device company payments in 2025. Listings are drawn from federal public records and are not endorsements.

Gastroenterology providers in Chicago

Listed alphabetically. Payment figures come from the federal Open Payments program, which requires drug and device companies to report what they pay physicians for consulting, speaking, meals, travel and royalties. A disclosed payment is a financial relationship, not evidence of wrongdoing, and many totals reflect a single meal. Figures cover calendar year 2025.

Dr. Steven Flamm, MD
Chicago, IL · $339,295 in drug and device payments (2025) · Telehealth · (312) 695-4837
Dr. Sudarshan Paramsothy, M.D.
Chicago, IL · No drug or device payments recorded (2025) · (773) 702-6840
Dr. Sujatha Kailas, MD
Chicago, IL · No drug or device payments recorded (2025) · Telehealth · (312) 335-0180
Dr. Suraj Sharma, M.D.
Chicago, IL · No drug or device payments recorded (2025) · (773) 795-7624
Dr. Susan Mikolaitis, R.D.
Chicago, IL · No drug or device payments recorded (2025) · (312) 942-5861
Dr. Tenzin Choden, M.D.
Chicago, IL · $101 in drug and device payments (2025) · Telehealth · (773) 795-1824
Dr. Terrance Rodrigues, MD
Chicago, IL · $1,217 in drug and device payments (2025) · Telehealth · (312) 695-5620
Dr. Theodor Griggs, M.D., PH.D.
Chicago, IL · $21 in drug and device payments (2025) · (952) 797-3323
Dr. Thomas Cullins, M.D.
Chicago, IL · No drug or device payments recorded (2025) · (773) 874-8388
Dr. Thomas Layden, M.D.
Chicago, IL · No drug or device payments recorded (2025) · (312) 704-2885
Dr. Thomas Lee, MD
Chicago, IL · No drug or device payments recorded (2025) · Telehealth · (312) 695-4837
Dr. Thomas Lu, MD, PHD
Chicago, IL · $771 in drug and device payments (2025) · (773) 702-1000
Dr. Thomas Nealis, M.D.
Chicago, IL · No drug or device payments recorded (2025) · Telehealth · (312) 695-5620
Dr. Timothy Toomey, MD
Chicago, IL · $548 in drug and device payments (2025) · (773) 702-6073
Dr. Uzma Siddiqui
Chicago, IL · $31,415 in drug and device payments (2025) · Telehealth · (888) 824-0200
Dr. Veena Nannegari, M.D.
Chicago, IL · No drug or device payments recorded (2025) · (312) 996-7059
Dr. Vijaya Rao
Chicago, IL · $225 in drug and device payments (2025) · (888) 824-0200
Dr. Vishal Desai, M.D.
Chicago, IL · $1,303 in drug and device payments (2025) · (630) 717-2600
Dr. Vivian Lee, MD, MSC
Chicago, IL · No drug or device payments recorded (2025) · Telehealth · (773) 702-1000
Dr. Wanchai Sangchantr, MD
Chicago, IL · No drug or device payments recorded (2025) · (773) 665-3084
Dr. William Markey, MD
Chicago, IL · No drug or device payments recorded (2025) · (312) 944-1247
Dr. William Riles, M.D.
Chicago, IL · No drug or device payments recorded (2025) · (312) 864-7344
Dr. Wojciech Blogowski, MD
Chicago, IL · No drug or device payments recorded (2025) · Telehealth · (312) 942-5861
Dr. Yasmin Gerais
Chicago, IL · No drug or device payments recorded (2025) · (773) 665-3000
Dr. Yichun Fu
Chicago, IL · $132 in drug and device payments (2025) · Telehealth · (773) 795-1824
Dr. Yolanda Lalyre-rodriguez, M.D.
Chicago, IL · No drug or device payments recorded (2025) · (773) 772-1212
Dr. Yui Chan, M.D.
Chicago, IL · $102 in drug and device payments (2025) · (312) 842-9888
Dr. Zoe Post, MD MSC
Chicago, IL · $2,301 in drug and device payments (2025) · (312) 926-2000

Conditions Gastroenterology providers in Chicago, Illinois commonly treat

Patients often search by condition rather than specialty. These are conditions typically managed by Gastroenterology providers. Individual practices vary, so confirm with the provider before booking.

Common questions

How many Gastroenterology providers are in Chicago, Illinois?

There are 278 Gastroenterology providers with active NPI records practicing in Chicago, according to federal NPPES data refreshed monthly.

How many Gastroenterology providers in Chicago received drug or device company payments?

159 of 278 (57%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.

What conditions do Gastroenterology providers in Chicago treat?

Gastroenterology providers in Chicago commonly treat acid reflux, IBS, Crohn disease, ulcerative colitis, celiac disease and related conditions. Individual practices vary, so confirm with the provider before booking.

Where does this data come from?

Provider records come from the federal NPPES registry and CMS Doctors and Clinicians files. Payment figures come from the CMS Open Payments program for calendar year 2025. The directory refreshes monthly.

All specialties in Chicago Gastroenterology across Illinois

Try a city like Tucson, a zip like 85016, or a specialty like psychiatry. For a doctor by name, use the full search.
Sources: NPPES (CMS), Doctors and Clinicians national files, CMS Open Payments 2025. Updated monthly. Records are public federal data and are not verified credentials, licensure checks, or endorsements. This directory is informational and not medical advice. How we build this directory.