| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 4.7 / 5 (154 reviews) | Vienna, Austria | 48+ years | PET/CT | — | — | International Organization for Standardization, World's Best Hospitals 2021 by Newsweek | ||
| #2 | 4.5 / 5 (19 reviews) | Vienna, Austria | 44+ years | Lobectomy | — | — | International Organization for Standardization |