| #1 | | | Incheon, Republic of Korea | | 26+ years | Colonoscopy | — | — | Korean Institute for Healthcare Accreditation |
| #2 | | | Seoul, Republic of Korea | | 32+ years45,000+ treatments | Radiotherapy for cervical cancer, HIFU for prostate cancer treatment | — | — | International Organization for Standardization, Korean Institute for Healthcare Accreditation |
| #3 | | | Seoul, Republic of Korea | | 139+ years | Radiotherapy for breast cancer, Thyroid resection | — | — | Joint Commission International , Korean Institute for Healthcare Accreditation |
| #4 | | | Incheon, Republic of Korea | | 46+ years | Thyroid resection , Hyperthermic Intraperitoneal Chemotherapy (HIPEC) | — | — | World's Best Hospitals 2021 by Newsweek |
| #5 | | | Seoul, Republic of Korea | | 141+ years32,000+ treatments | Mastectomy, Robotic da Vinci prostatectomy | — | — | Global Healthcare Accreditation Program, World's Best Hospitals 2021 by Newsweek |
| #6 | | | Seoul, Republic of Korea | | 37+ years65,000+ treatments | Bone marrow transplantation, Pneumonectomy | — | — | International Organization for Standardization, Korean Institute for Healthcare Accreditation |
| #7 | | | Seoul, Republic of Korea | | 141+ years | Laparoscopic nephrectomy, Mastectomy | — | — | Joint Commission International , Korean Institute for Healthcare Accreditation |
| #8 | | | Seoul, Republic of Korea | | 141+ years | Radiation therapy for colorectal cancer, Tongue cancer surgery | — | — | Joint Commission International , Korean Institute for Healthcare Accreditation |
| #9 | | | Seoul, Republic of Korea | | 52+ years | Gastroectomy, Removal of liver cancer | — | — | World's Best Hospitals 2021 by Newsweek |
| #10 | | | Seoul, Republic of Korea | | — | Chemotherapy for gallbladder cancer, Gamma Knife for brain tumor | — | — | World's Best Hospitals 2021 by Newsweek, World's Best Smart Hospitals 2021 by Newsweek |