| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 4.5 / 5 (23) | Seoul, Republic of Korea | 45,000+ treatments | Radiotherapy for cervical cancer, Radioiodine therapy | — | — | International Organization for Standardization, Korean Institute for Healthcare Accreditation | ||
| #2 | 5.0 / 5 (4) | Incheon, Republic of Korea | — | — | CT of thoracic, abdominal and pelvic organs | — | — | Korean Institute for Healthcare Accreditation | |
| #3 | 5.0 / 5 (9) | Seoul, Republic of Korea | — | — | Chemotherapy for breast cancer, Hysterectomy (uterus removal) | — | — | Joint Commission International , Korean Institute for Healthcare Accreditation | |
| #4 | 4.8 / 5 (6) | Seoul, Republic of Korea | — | 32,000+ treatments | Colectomy (large bowel resection), Lobectomy | — | — | Global Healthcare Accreditation Program, World's Best Hospitals 2021 by Newsweek | |
| #5 | 4.8 / 5 (5) | Incheon, Republic of Korea | — | — | Hyperthermic Intraperitoneal Chemotherapy (HIPEC), Thyroid resection | — | — | World's Best Hospitals 2021 by Newsweek | |
| #6 | 4.5 / 5 (7) | Seoul, Republic of Korea | — | 65,000+ treatments | Transurethral resection of the prostate (TURP), Throat cancer operation | — | — | International Organization for Standardization, Korean Institute for Healthcare Accreditation | |
| #7 | 3.5 / 5 (4) | Seoul, Republic of Korea | — | — | Liver resection, Cryodestruction | — | — | Joint Commission International , Korean Institute for Healthcare Accreditation | |
| #8 | 4.5 / 5 (43) | Seoul, Republic of Korea | — | — | Radiation therapy for colorectal cancer, Radiotherapy for lung cancer | — | — | Joint Commission International , Korean Institute for Healthcare Accreditation | |
| #9 | 5.0 / 5 (2) | Seoul, Republic of Korea | — | — | Lung cancer surgery, Removal of liver cancer | — | — | World's Best Hospitals 2021 by Newsweek | |
| #10 | 5.0 / 5 (1) | Seoul, Republic of Korea | — | — | Gastroectomy, Chemotherapy for gallbladder cancer | — | — | World's Best Hospitals 2021 by Newsweek, World's Best Smart Hospitals 2021 by Newsweek |