# Best Gastroenterologists in Illinois (October 2026)

Updated October 2026. Source: https://bestdocs.us/illinois/gastroenterologists/

Dr. Kenneth Schoenig ranks first with a score of 85.1: 5.0 stars from 192 Google reviews; 34 years since medical school; accepts Medicare assignment. Dr. Vincent Muscarello ranks second with a score of 83.8: 4.9 stars from 288 Google reviews; 44 years since medical school; accepts Medicare assignment. Dr. Poonputt Chotiprasidhi ranks third with a score of 82.9: 4.9 stars from 211 Google reviews; 33 years since medical school; accepts Medicare assignment.

1. **Kenneth Schoenig, MD** — Gastroenterologist, Bloomington, IL. Score 85.1. Google 5.0 from 192 reviews; 34 years since medical school; accepts Medicare assignment; enrolled in Illinois Medicaid. [Profile](https://bestdocs.us/doctor/kenneth-schoenig-gastroenterologist-bloomington-1033147848/)
2. **Vincent Muscarello, MD** — Gastroenterologist, Oak Lawn, IL. Score 83.8. Google 4.9 from 288 reviews; 44 years since medical school; accepts Medicare assignment; enrolled in Illinois Medicaid. [Profile](https://bestdocs.us/doctor/vincent-muscarello-gastroenterologist-oak-lawn-1134188675/)
3. **Poonputt Chotiprasidhi, MD** — Gastroenterologist, Moline, IL. Score 82.9. Google 4.9 from 211 reviews; 33 years since medical school; accepts Medicare assignment; enrolled in Illinois Medicaid. [Profile](https://bestdocs.us/doctor/poonputt-chotiprasidhi-gastroenterologist-moline-1558363713/)
4. **Sanjay Bangarulingam, MD** — Gastroenterologist, Springfield, IL. Score 82.6. Google 5.0 from 115 reviews; 30 years since medical school; accepts Medicare assignment; enrolled in Illinois Medicaid. [Profile](https://bestdocs.us/doctor/sanjay-bangarulingam-gastroenterologist-springfield-1952408734/)
5. **William Peterson, MD** — Gastroenterologist, Springfield, IL. Score 79.7. Google 4.9 from 97 reviews; 45 years since medical school; accepts Medicare assignment; enrolled in Illinois Medicaid. [Profile](https://bestdocs.us/doctor/william-peterson-gastroenterologist-springfield-1174623854/)
6. **William Kosmala, MD** — Gastroenterologist, Palos Heights, IL. Score 79.5. Google 4.9 from 196 reviews; 27 years since medical school; accepts Medicare assignment; enrolled in Illinois Medicaid. [Profile](https://bestdocs.us/doctor/william-kosmala-gastroenterologist-palos-heights-1760442511/)
7. **Samir Patel, MD** — Gastroenterologist, Oak Lawn, IL. Score 79.1. Google 4.8 from 147 reviews; 39 years since medical school; accepts Medicare assignment; enrolled in Illinois Medicaid. [Profile](https://bestdocs.us/doctor/samir-patel-gastroenterologist-oak-lawn-1982664736/)
8. **Rick Chadha, MD** — Gastroenterologist, Palos Heights, IL. Score 78.4. Google 4.8 from 121 reviews; 30 years since medical school; accepts Medicare assignment; enrolled in Illinois Medicaid. [Profile](https://bestdocs.us/doctor/rick-chadha-gastroenterologist-palos-heights-1992770598/)
9. **Brian Blumenstein, MD** — Gastroenterologist, Oak Lawn, IL. Score 77.6. Google 4.8 from 97 reviews; 37 years since medical school; accepts Medicare assignment; enrolled in Illinois Medicaid. [Profile](https://bestdocs.us/doctor/brian-blumenstein-gastroenterologist-oak-lawn-1194784645/)
10. **Zahid Afzal, MD** — Gastroenterologist, Orland Park, IL. Score 77.4. Google 4.8 from 120 reviews; 29 years since medical school; accepts Medicare assignment; enrolled in Illinois Medicaid. [Profile](https://bestdocs.us/doctor/zahid-afzal-gastroenterologist-orland-park-1528044518/)

Ranked by the BestDocs score (https://bestdocs.us/methodology/), weighted toward independent third-party verified patient reviews (60%) over public anonymous reviews (40%). Sponsored placements never change rank.