| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 4.7 / 5 (486) | Barcelona, Spain | — | 23,000+ treatments | Excision of skull base tumor, Ocrevus (ocrelizumab) | — | — | Joint Commission International , European Foundation for Quality Management | |
| #2 | 4.7 / 5 (7) | Pamplona, Spain | — | — | Proton-beam therapy, Allogenic bone marrow transplantation from an unrelated donor | — | — | Joint Commission International , European Society for Medical Oncology | |
| #3 | 4.6 / 5 (5) | Barcelona, Spain | 31+ years | Brain FDG PET | — | — | European Foundation for Quality Management, Certification according to DIN EN ISO 9001 by TÜV NORD CERT | ||
| #4 | 2.5 / 5 | Madrid, Spain | 36+ years | Brain FDG PET | — | — | European Foundation for Quality Management, Certification according to DIN EN ISO 9001 by TÜV NORD CERT |