| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 4.6 / 5 (514 reviews) | Istanbul, Turkey | — | — | Radiotherapy for lung cancer, Radiation therapy for brain tumor | — | — | Planetree's Gold Certificate, International Accreditation System for Interventional Oncology Services (IASIOS) | |
| #2 | 4.6 / 5 (66 reviews) | Milan, Italy | — | 8,000+ treatments | Bone marrow transplantation, Mastectomy | — | — | Scientific Institute for Research and Healthcare Accrediatation, World's Best Hospitals 2021 by Newsweek | |
| #3 | 4.7 / 5 (441 reviews) | Barcelona, Spain | — | 23,000+ treatments | Radiotherapy for prostate cancer, CyberKnife for brain tumor | — | — | Joint Commission International , European Foundation for Quality Management | |
| #4 | 4.5 / 5 (52 reviews) | Frankfurt am Main, Germany | — | — | Immunotherapy for breast cancer, Lung cancer surgery | — | — | TÜV AG Сompany Research & Investing Certificate, TOP German hospital according to 2019 Focus ranking | |
| #5 | 4.7 / 5 (357 reviews) | Istanbul, Turkey | — | — | Thyroid resection , Hysterectomy (uterus removal) | — | — | International Organization for Standardization, Joint Commission International | |
| #6 | 4.7 / 5 (132 reviews) | Istanbul, Turkey | — | — | Radiotherapy, Lymphadenectomy | — | — | International Organization for Standardization, Joint Commission International | |
| #7 | 4.6 / 5 (130 reviews) | Hamburg, Germany | — | — | Radiotherapy for throat cancer, Lung cancer surgery | — | — | International Organization for Standardization, Medical Travel Quality Alliance | |
| #8 | 4.3 / 5 (16 reviews) | Hamburg, Germany | — | — | Gastroectomy, Immunotherapy | — | — | International Organization for Standardization, Medical Travel Quality Alliance | |
| #9 | 4.0 / 5 (1 review) | Hamburg, Germany | — | — | Chemotherapy, Radiotherapy for prostate cancer | — | — | World's Best Hospitals 2021 by Newsweek | |
| #10 | 4.6 / 5 (473 reviews) | Istanbul, Turkey | — | — | Brachytherapy for prostate cancer, Lung cancer surgery | — | — | Joint Commission International , Patient choice in Pediatric Oncology & Hematology Oncology |