| Rank | Clinic Name | Patient Rating | Country | Lead Doctor | experience | Techniques | Best For | Why It’s Ranked | Accreditations |
|---|---|---|---|---|---|---|---|---|---|
| #1 | 3.8 / 5 (6 reviews) | Madrid, Spain | — | — | Kidney transplant | — | — | World's Best Hospitals 2021 by Newsweek | |
| #2 | 4.4 / 5 (6 reviews) | Barcelona, Spain | 38+ years | Kidney transplant | — | — | Joint Commission International | ||
| #3 | 5.0 / 5 (6 reviews) | Pamplona, Spain | — | Kidney transplant | — | — | Joint Commission International , European Society for Medical Oncology |