| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 4.7 / 5 (441 reviews) | Barcelona, Spain | — | 23,000+ treatments | Radiotherapy for prostate cancer, CyberKnife for brain tumor | — | — | Joint Commission International , European Foundation for Quality Management | |
| #2 | 3.8 / 5 (6 reviews) | Madrid, Spain | — | — | Bone marrow transplantation, Robotic da Vinci prostatectomy | — | — | World's Best Hospitals 2021 by Newsweek | |
| #3 | 4.6 / 5 (16 reviews) | Madrid, Spain | — | 26,000+ treatments | Chemotherapy for ovarian cancer, Lung cancer surgery | — | — | European Foundation for Quality Management, TÜV AG Сompany Research & Investing Certificate | |
| #4 | 2.5 / 5 (0 reviews) | Madrid, Spain | 36+ years | PET-CT with Gallium 68(PSMA) | — | — | European Foundation for Quality Management, Certification according to DIN EN ISO 9001 by TÜV NORD CERT | ||
| #5 | 5.0 / 5 (6 reviews) | Pamplona, Spain | — | — | Vaporization (with GreenLight Laser) , Proton-beam therapy | — | — | Joint Commission International , European Society for Medical Oncology |