| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 4.6 / 5 (431) | Istanbul, Turkey | — | — | Colectomy (large bowel resection), Cryotherapy | — | — | International Organization for Standardization, Joint Commission International | |
| #2 | 4.6 / 5 (540) | Istanbul, Turkey | — | — | Chemotherapy, Removal of liver cancer | — | — | Planetree's Gold Certificate, International Accreditation System for Interventional Oncology Services (IASIOS) | |
| #3 | 4.6 / 5 (175) | Vienna, Austria | — | — | Consultation with a thoracic surgeon | — | — | World's Best Hospitals 2021 by Newsweek, International Organization for Standardization | |
| #4 | 5.0 / 5 (58) | Istanbul, Turkey | — | — | Brain tumor removal, Thyroidectomy | — | — | Joint Commission International , International Organization for Standardization | |
| #5 | 4.9 / 5 (59) | Istanbul, Turkey | 16+ years | Chemotherapy, Laser surgery | — | — | Turkish Medical Association, International Health Tourism Authorization Certificate | ||
| #6 | 5.0 / 5 (3) | Madrid, Spain | — | — | Gamma Knife for brain tumor, Consultation with a thoracic surgeon | — | — | Joint Commission International , International Organization for Standardization | |
| #7 | 4.2 / 5 (19) | Istanbul, Turkey | — | — | Allogenic bone marrow transplantation from an unrelated donor, Autologous bone marrow transplantation | — | — | Best clinic for radiotherapy, Best price for PET/CT | |
| #8 | 3.6 / 5 | Goyang, Republic of Korea | — | — | Chemotherapy, Craniotomy | — | — | Advanced Regenerative Medicine Implementation Institution (Ministry of Health and Welfare, Republic of Korea) | |
| #9 | 4.2 / 5 (21) | Vienna, Austria | — | — | Consultation with a thoracic surgeon | — | — | International Organization for Standardization | |
| #10 | 4.5 / 5 (495) | Istanbul, Turkey | 34+ years | Removal of meningioma, Chemotherapy for pancreatic cancer | — | — | Joint Commission International , Patient choice in Pediatric Oncology & Hematology Oncology |