| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 3.4 / 5 (0 reviews) | Madrid, Spain | — | — | Endocrinology | — | — | Joint Commission International | |
| #2 | 3.8 / 5 (6 reviews) | Madrid, Spain | — | — | Thyroidectomy | — | — | World's Best Hospitals 2021 by Newsweek | |
| #3 | 4.5 / 5 (0 reviews) | Madrid, Spain | — | — | Endocrinology | — | — | Joint Commission International , International Organization for Standardization | |
| #4 | 4.6 / 5 (16 reviews) | Madrid, Spain | — | 26,000+ treatments | Biochemical blood analysis | — | — | European Foundation for Quality Management, TÜV AG Сompany Research & Investing Certificate | |
| #5 | 2.5 / 5 (0 reviews) | Madrid, Spain | — | — | Basic check-up, Premium Check up | — | — | European Foundation for Quality Management, Certification according to DIN EN ISO 9001 by TÜV NORD CERT | |
| #6 | 4.3 / 5 (0 reviews) | Madrid, Spain | — | — | Endocrinology | — | — | — | |
| #7 | 4.0 / 5 (0 reviews) | Madrid, Spain | — | — | Radioiodine therapy | — | — | — | |
| #8 | 2.8 / 5 (0 reviews) | Madrid, Spain | — | — | Endocrinology | — | — | European Foundation for Quality Management, Certification according to DIN EN ISO 9001 by TÜV NORD CERT | |
| #9 | — / 5 (0 reviews) | Madrid, Spain | — | — | Endocrinology | — | — | International Organization for Standardization, European Foundation for Quality Management |