886 Gastroenterology providers practice in Illinois, including 264 (30%) offering telehealth. The largest concentration is in Chicago. Profiles include federal Open Payments records of money received from drug and device companies in 2025. Listings are drawn from federal public records and are not endorsements.
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| Gastroenterology in Chicago | 278 providers |
| Gastroenterology in Maywood | 39 providers |
| Gastroenterology in Springfield | 25 providers |
| Gastroenterology in Rockford | 25 providers |
| Gastroenterology in Aurora | 23 providers |
| Gastroenterology in Naperville | 23 providers |
| Gastroenterology in Peoria | 19 providers |
| Gastroenterology in Evanston | 18 providers |
| Gastroenterology in Niles | 18 providers |
| Gastroenterology in Glenview | 17 providers |
| Gastroenterology in Oak Lawn | 17 providers |
| Gastroenterology in Des Plaines | 15 providers |
| Gastroenterology in Arlington Heights | 15 providers |
| Gastroenterology in Elmhurst | 15 providers |
| Gastroenterology in Elgin | 13 providers |
| Gastroenterology in Gurnee | 11 providers |
| Gastroenterology in Hazel Crest | 11 providers |
| Gastroenterology in Libertyville | 11 providers |
| Gastroenterology in Lake Barrington | 10 providers |
| Gastroenterology in Winfield | 10 providers |
| Gastroenterology in Bourbonnais | 9 providers |
| Gastroenterology in Decatur | 9 providers |
| Gastroenterology in Hoffman Estates | 9 providers |
| Gastroenterology in Olympia Fields | 9 providers |
From CMS Medicare enrollment records covering 598 of the 886 providers listed here (67%). Providers who do not bill Medicare are not included in these figures.
| Group (as registered with Medicare) | Gastroenterologists | All clinicians in group | Main city |
| Northwestern Medical Faculty Foundation | 83 | 4,386 | Chicago |
| Illinois Gastroenterology Group LLC | 50 | 116 | Elgin |
| Endeavor Health Medical Group | 47 | 3,330 | Evanston |
| Advocate Health and Hospitals Corp.oration | 42 | 3,081 | Buffalo Grove |
| University of Chicago | 33 | 1,674 | Chicago |
| Hospital | City | Ownership | CMS star rating | Gastroenterologists affiliated |
| Northwestern Medicine Central Dupage Hospital | Winfield | Nonprofit | 5 of 5 | 95 |
| Northwestern Memorial Hospital | Chicago | Nonprofit | 5 of 5 | 62 |
| Northshore University Healthsystem - Evanston Hospital | Evanston | Nonprofit | 5 of 5 | 60 |
| Northwestern Lake Forest Hospital | Lake Forest | Nonprofit | 5 of 5 | 40 |
| The University of Chicago Medical Center | Chicago | Nonprofit | 4 of 5 | 39 |
Sources: CMS Doctors and Clinicians (August 2026) and Facility Affiliation files (August 2026); hospital ownership type and overall star rating from CMS Hospital General Information (July 2026). A clinician in several groups is counted once, in the largest group they bill through. Ownership type is what the hospital reports to CMS; it does not show private equity or other investor ownership. How we build this directory.
Listed by city, largest first. 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.
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.
There are 886 Gastroenterology providers with active NPI records practicing in Illinois, according to federal NPPES data refreshed monthly.
Yes. 264 of the 886 Gastroenterology providers in Illinois (about 30%) report offering telehealth services in CMS data.
Chicago (278), Maywood (39), Springfield (25) have the highest concentration of Gastroenterology providers in Illinois.
554 of 886 Gastroenterology providers in Illinois (63%) received at least one payment from a drug or device company in 2025, according to the federal Open Payments program.
Gastroenterology providers commonly treat acid reflux, IBS, Crohn disease, ulcerative colitis, celiac disease and related conditions. Individual practices vary, so confirm with the provider before booking.
Provider counts and profiles 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.
Among 598 Gastroenterologists in Illinois enrolled in Medicare, 9% bill through a solo or small practice with fewer than 10 clinicians, 9% through a mid-size group of 10 to 99, and 82% through a large group or health system with 100 or more clinicians, according to CMS enrollment records.
According to CMS facility affiliation records, the Illinois hospitals where the most Gastroenterologists hold privileges are Northwestern Medicine Central Dupage Hospital in Winfield; Northwestern Memorial Hospital in Chicago; Northshore University Healthsystem - Evanston Hospital in Evanston.
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