| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 4.6 / 5 | Madrid, Spain | — | — | Online Consultation with Oncologist | — | — | Joint Commission International , European Society for Medical Oncology | |
| #2 | 3.8 / 5 (6) | Madrid, Spain | — | — | Liver resection, Robotic da Vinci prostatectomy | — | — | World's Best Hospitals 2021 by Newsweek | |
| #3 | 5.0 / 5 (1) | Madrid, Spain | 31+ years | Online Consultation with Oncologist | — | — | Joint Commission International , International Organization for Standardization | ||
| #4 | 4.7 / 5 (17) | Madrid, Spain | 31+ years26,000+ treatments | Radiosurgery of a brain tumor, Pneumonectomy | — | — | European Foundation for Quality Management, TÜV AG Сompany Research & Investing Certificate | ||
| #5 | 2.5 / 5 | Madrid, Spain | 36+ years | Online Consultation with Oncologist | — | — | European Foundation for Quality Management, Certification according to DIN EN ISO 9001 by TÜV NORD CERT |