| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 4.6 / 5 (175) | Vienna, Austria | 36+ years | Consultation with an oncologist | Second opinion with on-site endoscopy and molecular analysis | — | World's Best Hospitals 2021 by Newsweek, International Organization for Standardization | ||
| #2 | 4.2 / 5 (21) | Vienna, Austria | 26+ years | Gastroscopy | Patients with malignant changes or cancer concerns | — | International Organization for Standardization |