| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 4.7 / 5 (440 reviews) | Barcelona, Spain | — | 23,000+ treatments | Immunotherapy, Chemotherapy for breast cancer | — | — | Joint Commission International , European Foundation for Quality Management | |
| #2 | 2.5 / 5 (0 reviews) | Madrid, Spain | 36+ years | PET-CT with Gallium 68 (DOTA) | — | — | European Foundation for Quality Management, Certification according to DIN EN ISO 9001 by TÜV NORD CERT | ||
| #3 | 5.0 / 5 (6 reviews) | Pamplona, Spain | — | — | Craniotomy, Allogenic bone marrow transplantation from a related donor | — | — | Joint Commission International , European Society for Medical Oncology |