| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 3.9 / 5 | Seoul, Republic of Korea | — | — | Basic check-up | — | — | Korean Institute for Healthcare Accreditation | |
| #2 | 4.5 / 5 (23) | Seoul, Republic of Korea | — | 45,000+ treatments | Radioiodine therapy, Thyroidectomy | — | — | International Organization for Standardization, Korean Institute for Healthcare Accreditation | |
| #3 | — / 5 | Incheon, Republic of Korea | — | — | Basic check-up, Premium Check up | — | — | Advanced Regenerative Medicine Implementation Institution (Ministry of Health and Welfare, Republic of Korea), Korean Institute for Healthcare Accreditation | |
| #4 | 5.0 / 5 (9) | Seoul, Republic of Korea | — | — | Endocrinology | — | — | Joint Commission International , Korean Institute for Healthcare Accreditation | |
| #5 | 4.8 / 5 (6) | Seoul, Republic of Korea | — | 32,000+ treatments | Thyroidectomy, Premium Check up | — | — | Global Healthcare Accreditation Program, World's Best Hospitals 2021 by Newsweek | |
| #6 | 4.8 / 5 (5) | Incheon, Republic of Korea | — | — | Endocrinology | — | — | World's Best Hospitals 2021 by Newsweek | |
| #7 | 4.5 / 5 (7) | Seoul, Republic of Korea | — | 65,000+ treatments | Premium Check up | — | — | International Organization for Standardization, Korean Institute for Healthcare Accreditation | |
| #8 | 3.5 / 5 (4) | Seoul, Republic of Korea | — | — | Thyroid ultrasound, Premium Check up | — | — | Joint Commission International , Korean Institute for Healthcare Accreditation | |
| #9 | 4.5 / 5 (43) | Seoul, Republic of Korea | — | — | Robotic surgery for thyroid tumors, radiosurgery | Thyroid gland tumors | Specializes in robotic surgery for thyroid tumors. JCI accredited hospital with 4,000 automated operations performed. Treats 660,000 patients annually. | Joint Commission International , Korean Institute for Healthcare Accreditation | |
| #10 | 5.0 / 5 (2) | Seoul, Republic of Korea | — | Radioiodine therapy, Complex diagnostics of thyroid | — | — | World's Best Hospitals 2021 by Newsweek |