| 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 | 26+ years23,000+ treatments | Chemotherapy for breast cancer, Colectomy (large bowel resection) | — | — | Joint Commission International , European Foundation for Quality Management | ||
| #2 | 5.0 / 5 (6 reviews) | Pamplona, Spain | — | — | — | — | Joint Commission International , European Society for Medical Oncology | ||
| #3 | 4.6 / 5 (5 reviews) | Barcelona, Spain | 37+ years | — | — | — | European Foundation for Quality Management, Certification according to DIN EN ISO 9001 by TÜV NORD CERT |