| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 4.6 / 5 (0 reviews) | Vienna, Austria | — | — | Radiation therapy for kidney cancer, PET/CT | — | — | World's Best Hospitals 2026 by Newsweek | |
| #2 | 4.6 / 5 (0 reviews) | Vienna, Austria | — | — | Radiation therapy for kidney cancer | — | — | — |