| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 4.5 / 5 (25) | Seoul, Republic of Korea | 45,000+ treatments | Proton beam therapy, image-guided radiation therapy | Proton beam therapy candidates | Dedicated Proton Center offers precise tumor targeting with less damage to nearby tissue. Part of Asia's largest cancer center, with 17 disease-specific departments and 50,000+ patients treated. | International Organization for Standardization, Korean Institute for Healthcare Accreditation | ||
| #2 | 4.9 / 5 (7) | Seoul, Republic of Korea | — | 32,000+ treatments | PET/CT | — | — | Global Healthcare Accreditation Program, World's Best Hospitals 2021 by Newsweek | |
| #3 | 4.5 / 5 (7) | Seoul, Republic of Korea | 65,000+ treatments | — | — | — | International Organization for Standardization, Korean Institute for Healthcare Accreditation | ||
| #4 | 3.5 / 5 (4) | Seoul, Republic of Korea | — | — | — | — | — | Joint Commission International , Korean Institute for Healthcare Accreditation | |
| #5 | 4.5 / 5 (43) | Seoul, Republic of Korea | — | — | PET/CT | — | — | Joint Commission International , Korean Institute for Healthcare Accreditation | |
| #6 | 5.0 / 5 (1) | Seoul, Republic of Korea | — | PET/CT | — | — | World's Best Hospitals 2021 by Newsweek, World's Best Smart Hospitals 2021 by Newsweek | ||
| #7 | 3.6 / 5 | Seoul, Republic of Korea | 23+ years | PET/CT | — | — | Joint Commission International , Korean Institute for Healthcare Accreditation |