Worldwide ranking · 2026
Ratings updated 11 November 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: November 2026. How this data is verified →
| Rank | Clinic Name | Country | City | GCR Rating |
|---|---|---|---|---|
| 1 | Navamin 9 Hospital | Thailand | Bangkok | |
| 2 | Dr.Akhilesh | United Arab Emirates | Dubai | |
| 3 | Vejthani International Hospital | Thailand | Bangkok | |
| 4 | Newtown Gastroenterology | United States | New York | |
| 5 | Dr Piyush Somani | United Arab Emirates | Dubai | |
| 6 | Dr. med. Albrecht Sommer | Germany | Cologne | |
| 7 | Dr Nigel Beejay | United Arab Emirates | Dubai | |
| 8 | CER Hospital | Mexico | Tijuana | |
| 9 | Bangkok Hospital | Thailand | Bangkok | |
| 10 | Samitivej Sukhumvit Hospital | Thailand | Bangkok | |
| 11 | Dr. Juan José Aguiar | Mexico | Nuevo Vallarta | |
| 12 | Gastroclinica Especializada - Cuauhtémoc | Mexico | Mexico City | |
| 13 | Isar Klinikum | Germany | Munich | |
| 14 | Orlando Gastroenterology, PA | United States | Orlando | |
| 15 | Clinic MEDANTE | Slovakia | Bratislava | |
| 16 | Dr. Gaurav Muktesh | United Arab Emirates | Dubai | |
| 17 | Dr. Guinwa Khaddaj | United Arab Emirates | Dubai | |
| 18 | Coloskopium | Germany | Hanover | |
| 19 | German Clinic | Spain | Marbella | |
| 20 | Gastroenterologické centrum Bezručova | Slovakia | Bratislava | |
| 21 | Dr Nigel Beejay | United Arab Emirates | Abu Dhabi | |
| 22 | German Clinic Marbella | Spain | Marbella | |
| 23 | Salus Madrid Clinica Dental | Spain | Madrid | |
| 24 | Prof. Dr. Gökhan Kabaçam | Turkey | Ankara | |
| 25 | Memorial Bahçelievler Hastanesi | Turkey | Istanbul |
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.