| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 4.7 / 5 (489) | Barcelona, Spain | 39+ years1,000+ treatments | Immunotherapy for prostate cancer, Chemotherapy for breast cancer | — | — | Joint Commission International , European Foundation for Quality Management | ||
| #2 | 5.0 / 5 (2) | Madrid, Spain | — | — | PET-CT with Gallium 68(PSMA) | — | — | Joint Commission International , International Organization for Standardization | |
| #3 | 3.8 / 5 (6) | Madrid, Spain | — | — | Liver resection, Hysterectomy (uterus removal) | — | — | World's Best Hospitals 2021 by Newsweek | |
| #4 | 4.7 / 5 (17) | Madrid, Spain | — | 26,000+ treatments | Pneumonectomy, Radiosurgery of a brain tumor | — | — | European Foundation for Quality Management, TÜV AG Сompany Research & Investing Certificate | |
| #5 | 4.7 / 5 (7) | Pamplona, Spain | — | — | Vaporization (with GreenLight Laser) , Allogenic bone marrow transplantation from a related donor | — | — | Joint Commission International , European Society for Medical Oncology | |
| #6 | 2.5 / 5 | 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 |