| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 4.0 / 5 | Seoul, Republic of Korea | — | — | ECG | — | — | — | |
| #2 | 5.0 / 5 (9) | Seoul, Republic of Korea | — | — | ECG | — | — | Joint Commission International , Korean Institute for Healthcare Accreditation | |
| #3 | 4.8 / 5 (6) | Seoul, Republic of Korea | — | 32,000+ treatments | Coronary artery bypass grafting, Coronary stenting | — | — | Global Healthcare Accreditation Program, World's Best Hospitals 2021 by Newsweek | |
| #4 | 4.5 / 5 (7) | Seoul, Republic of Korea | — | 65,000+ treatments | Angioplasty | — | — | International Organization for Standardization, Korean Institute for Healthcare Accreditation | |
| #5 | 3.5 / 5 (4) | Seoul, Republic of Korea | — | — | ECG | — | — | Joint Commission International , Korean Institute for Healthcare Accreditation | |
| #6 | 4.5 / 5 (43) | Seoul, Republic of Korea | — | — | Coronary artery bypass grafting, Heart Valve Replacement | — | — | Joint Commission International , Korean Institute for Healthcare Accreditation | |
| #7 | 5.0 / 5 (2) | Seoul, Republic of Korea | — | — | Heart Valve Replacement, Coronary artery bypass grafting | — | — | World's Best Hospitals 2021 by Newsweek | |
| #8 | 4.4 / 5 (3) | Seoul, Republic of Korea | — | — | ECG | — | — | — | |
| #9 | 5.0 / 5 (1) | Seoul, Republic of Korea | — | — | Coronary stenting | — | — | World's Best Hospitals 2021 by Newsweek, World's Best Smart Hospitals 2021 by Newsweek | |
| #10 | 3.6 / 5 | Seoul, Republic of Korea | — | — | Coronary stenting, Radiofrequency ablation | — | — | Joint Commission International , Korean Institute for Healthcare Accreditation |