| #1 | | | Barcelona, Spain | | 41+ years23,000+ treatments | Immunotherapy with Keytruda (Pembrolizumab) | Advanced or metastatic cancers | Offers immunotherapy with Keytruda, follows Memorial Sloan-Kettering protocols, and has a multidisciplinary team for personalized cancer treatment plans. | Joint Commission International , European Foundation for Quality Management |
| #2 | | | Barcelona, Spain | | 18+ years | Immunotherapy with Keytruda (Pembolizumab) | — | — | Joint Commission International |
| #3 | | | Barcelona, Spain | | 37+ years | Immunotherapy with Keytruda (Pembolizumab) | — | — | European Foundation for Quality Management, Certification according to DIN EN ISO 9001 by TÜV NORD CERT |
| #4 | | | Madrid, Spain | | 44+ years | Immunotherapy with Keytruda (Pembolizumab) | — | — | — |