| 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 | — | — | Asia's largest cancer center with 17 departments, each dedicated to a specific cancer type. Offers proton beam and image-guided radiation therapy. 50,000+ cancer patients treated. | International Organization for Standardization, Korean Institute for Healthcare Accreditation | ||
| #2 | 5.0 / 5 (9) | Seoul, Republic of Korea | — | Chemotherapy for breast cancer | — | — | Joint Commission International , Korean Institute for Healthcare Accreditation | ||
| #3 | 4.9 / 5 (7) | Seoul, Republic of Korea | — | 32,000+ treatments | — | — | — | Global Healthcare Accreditation Program, World's Best Hospitals 2021 by Newsweek | |
| #4 | 4.5 / 5 (7) | Seoul, Republic of Korea | — | 65,000+ treatments | Bone marrow transplantation | — | — | International Organization for Standardization, Korean Institute for Healthcare Accreditation | |
| #5 | 3.5 / 5 (4) | Seoul, Republic of Korea | — | — | — | — | — | Joint Commission International , Korean Institute for Healthcare Accreditation | |
| #6 | 4.5 / 5 (43) | Seoul, Republic of Korea | — | — | — | — | — | Joint Commission International , Korean Institute for Healthcare Accreditation | |
| #7 | 5.0 / 5 (2) | Seoul, Republic of Korea | — | — | — | — | — | World's Best Hospitals 2021 by Newsweek | |
| #8 | 5.0 / 5 (1) | Seoul, Republic of Korea | — | — | — | — | World's Best Hospitals 2021 by Newsweek, World's Best Smart Hospitals 2021 by Newsweek |