| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 4.7 / 5 (156 reviews) | Vienna, Austria | 41+ years | Consultation with an oncologist | — | — | International Organization for Standardization, World's Best Hospitals 2021 by Newsweek | ||
| #2 | 4.6 / 5 (0 reviews) | Vienna, Austria | 26+ years | Radiation therapy for colorectal cancer | — | — | World's Best Hospitals 2026 by Newsweek | ||
| #3 | 3.9 / 5 (0 reviews) | Vienna, Austria | — | — | — | — | — | — | |
| #4 | — / 5 (0 reviews) | Vienna, Austria | — | — | — | — | — | — |