Gastroenterologists · Illinois · October 2026
Best Gastroenterologists in Illinois (October 2026)
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
5.0 out of 5 · 192 Google reviews
Score 85.1 · 34 years since medical school; accepts Medicare assignment
- 2
Vincent Muscarello, MD
4.9 out of 5 · 288 Google reviews
Score 83.8 · 44 years since medical school; accepts Medicare assignment
- 3
Poonputt Chotiprasidhi, MD
4.9 out of 5 · 211 Google reviews
Score 82.9 · 33 years since medical school; accepts Medicare assignment
- 4
Sanjay Bangarulingam, MD
5.0 out of 5 · 115 Google reviews
Score 82.6 · 30 years since medical school; accepts Medicare assignment
- 5
William Peterson, MD
4.9 out of 5 · 97 Google reviews
Score 79.7 · 45 years since medical school; accepts Medicare assignment
- 6
William Kosmala, MD
4.9 out of 5 · 196 Google reviews
Score 79.5 · 27 years since medical school; accepts Medicare assignment
- 7
Samir Patel, MD
4.8 out of 5 · 147 Google reviews
Score 79.1 · 39 years since medical school; accepts Medicare assignment
- 8
Rick Chadha, MD
4.8 out of 5 · 121 Google reviews
Score 78.4 · 30 years since medical school; accepts Medicare assignment
- 9
Brian Blumenstein, MD
4.8 out of 5 · 97 Google reviews
Score 77.6 · 37 years since medical school; accepts Medicare assignment
- 10
Zahid Afzal, MD
4.8 out of 5 · 120 Google reviews
Score 77.4 · 29 years since medical school; accepts Medicare assignment
The same list as a table
| Rank | Doctor | City | Score | Rating | Reviews | Years |
|---|---|---|---|---|---|---|
| 1 | Kenneth Schoenig, MD | Bloomington | 85.1 | 5.0 | 192 | 34 |
| 2 | Vincent Muscarello, MD | Oak Lawn | 83.8 | 4.9 | 288 | 44 |
| 3 | Poonputt Chotiprasidhi, MD | Moline | 82.9 | 4.9 | 211 | 33 |
| 4 | Sanjay Bangarulingam, MD | Springfield | 82.6 | 5.0 | 115 | 30 |
| 5 | William Peterson, MD | Springfield | 79.7 | 4.9 | 97 | 45 |
| 6 | William Kosmala, MD | Palos Heights | 79.5 | 4.9 | 196 | 27 |
| 7 | Samir Patel, MD | Oak Lawn | 79.1 | 4.8 | 147 | 39 |
| 8 | Rick Chadha, MD | Palos Heights | 78.4 | 4.8 | 121 | 30 |
| 9 | Brian Blumenstein, MD | Oak Lawn | 77.6 | 4.8 | 97 | 37 |
| 10 | Zahid Afzal, MD | Orland Park | 77.4 | 4.8 | 120 | 29 |
How we ranked
Ratings are weighted toward independent, third-party verified patient reviews. When a physician has them, 60% of the rating comes from patients surveyed by an independent third party (not chosen by the practice) and 40% from public, anonymous reviews such as Google. Anonymous reviews alone count for less, so a few posts can't carry a physician to the top. The score also weighs years since medical school and accepting Medicare assignment. Every physician here has a verified practice website and at least five patient reviews. No one can pay to change a rank. Read the full method.
Questions
Who is the highest-ranked gastroenterologist in Illinois?
Kenneth Schoenig, MD in Bloomington, with a BestDocs score of 85.1 (5.0 stars from 192 Google reviews; 34 years since medical school; accepts Medicare assignment).
How many gastroenterologists in Illinois have online booking?
11 of the 67 ranked gastroenterologists in Illinois offer online booking on their practice website.
How are these gastroenterologists ranked?
By the BestDocs score, which is weighted toward independent third-party verified patient reviews: patient rating (50 points; 60% independent verified reviews and 40% anonymous public reviews when both exist), years in practice (31.25) and verified credentials (18.75). Sponsored placements never change rank. The full method is on the methodology page.
Data as of October 2026. Sources: CMS NPPES, CMS Doctors and Clinicians file, Google business listings, practice websites. Ratings are Google ratings, shown as text and not marked up as reviews.