Worldwide ranking · 2026
Ratings updated 1 October 2026
Colonoscopy, endoscopy and gastrointestinal disorder treatment — ranked on one transparent GCR Rating, highest first.
Compiled independently by GCR since 2012 from verified patient reviews — no clinic can pay to change its Rating. Most recent verified review: September 2026. How this data is verified →
| Rank | Clinic Name | Country | City | GCR Rating |
|---|---|---|---|---|
| 1 | Navamin 9 Hospital | Thailand | Krung Thep Maha Nakhon | |
| 2 | Vejthani International Hospital | Thailand | Krung Thep Maha Nakhon | |
| 3 | Manhattan Gastroenterology | United States | New York | |
| 4 | Dr Piyush Somani Gastroenterologist | United Arab Emirates | Dubai | |
| 5 | Allied Digestive Health | United States | West Long Branch | |
| 6 | Newtown Gastroenterology | United States | Queens County | |
| 7 | Dr. med. Albrecht Sommer | Germany | Koln | |
| 8 | Dr.Akhilesh | United Arab Emirates | Dubai | |
| 9 | Dr. Halit Abdullah Muayenehanesi | Turkey | Konyaalt | |
| 10 | Gastroenterology Associates of Beverly Hills | United States | Los Angeles | |
| 11 | Orlando Gastroenterology, PA - Gastroenterologist Orlando | United States | Orlando | |
| 12 | Memorial Bahçelievler Hastanesi | Turkey | Bahcelievler | |
| 13 | Bangkok Hospital | Thailand | Krung Thep Maha Nakhon | |
| 14 | Poliklinika Mlynská dolina | Slovakia | Bratislava IV | |
| 15 | RKM 740 Privatpraxis Gastroenterologie - PD Dr. Grossmann, Dr. Nguyen, Prof. Dr. Neuhaus | Germany | Dusseldorf | |
| 16 | Atlantic Clinic doctor | Spain | Marbella | |
| 17 | Dr. Pedro de María Pallarés - Digestivo y Endoscopia Avanzada | Spain | Madrid | |
| 18 | Dr. Guinwa Khaddaj - Gastroenterologist and Hepatologist (HealthBay Gastroenterology & Digestive Health | United Arab Emirates | Dubai | |
| 19 | Gastroenterology Consultants of San Antonio Ambulatory Center | United States | San Antonio | |
| 20 | Cirujano Gastroenterólogo en Durango - Dr. Salomón Corral | Mexico | Durango | |
| 21 | Hyrdel Rudolf prof. MD. PhD. - Gastro-between, Ltd. | Slovakia | Martin | |
| 22 | Dr. med. Thomas Brunk | Germany | Berlin | |
| 23 | MUDr. Dušan Baláž - gastroenterológia | Slovakia | Martin | |
| 24 | The Liver Clinic | United Kingdom | Greater London | |
| 25 | Gastroenterology Diagnostics of Northern New Jersey | United States | Woodland Park |
The GCR Rating is computed from verified patient reviews, patient-reported outcomes and clinical results. How the Rating is calculated →
The GCR Rating is computed from verified patient reviews — rating, volume and recency — using a Bayesian model, not a simple average, and that calculation is the same for every specialty GCR ranks. Clinics in this ranking provide colonoscopy, endoscopy and treatment for conditions such as IBS and IBD — patients evaluating this category typically weigh how thoroughly a diagnosis was explained and how comfortable the procedure itself was. See the full methodology for the exact formula.
No. The GCR Rating is a separate score (out of 5, to three decimals) computed from verified review rating, volume and recency using a Bayesian model — not a simple star average. Two gastroenterology & endoscopy clinics with the same Google star rating can end up with different GCR Ratings once volume and recency are factored in.
There's no fixed cutoff. GCR's Bayesian model pulls a clinic's average toward the gastroenterology & endoscopy specialty-wide mean in proportion to how few verified reviews it has — so a clinic with limited review history starts near the typical score for the specialty and earns its way up or down as more verified reviews accumulate, rather than being excluded outright.
Rankings are refreshed on a regular cycle as new verified reviews come in, so a gastroenterology & endoscopy clinic's position can move up or down over time as its underlying review data changes.
GCR ranks clinics it has verified review data for. If a clinic you're considering isn't listed, you can suggest it for review — GCR will look into adding it once enough verified patient data is available.