Spain · 2026
Ratings updated 14 October 2026
The highest-rated oncology & cancer facilities in Spain — ranked on one transparent GCR Rating, highest first.
Ranked by GCR Rating (out of 5). No stars, no review counts — one fair number per facility.| Rank | Clinic Name | GCR Rating |
|---|---|---|
| 1 | National Cancer Research Center | |
| 2 | MD Anderson Cancer Center Madrid | |
| 3 | VHIO Vall d'Hebron Institut d’Oncologia | |
| 4 | IVO. Instituto Valenciano de Oncología | |
| 5 | Centro de Patología de la Mama - Fundación Tejerina | |
| 6 | Comprehensive Cancer Center CLARA CAMPAL | |
| 7 | Instituto Viamed de Oncología Quirúrgica Avanzada | |
| 8 | Centro 360 de Excelencia Oncológica GCCC | |
| 9 | Centro de Excelencia GenesisCare Málaga | |
| 10 | IOB Institute of Oncology | |
| 11 | SJD Pediatric Cancer Center Barcelona | |
| 12 | Oncologia Barcelona - Institut Imor |
The GCR Rating is computed from verified patient reviews, patient-reported outcomes and clinical results. How the Rating is calculated →
The GCR Rating is computed from verified patient reviews — rating, volume and recency — using a Bayesian model, not a simple average, and that calculation is the same for every specialty GCR ranks. Clinics in this ranking provide cancer diagnosis, chemotherapy, radiotherapy and surgical treatment — patients evaluating this category place particular weight on communication during an already difficult experience, alongside clinical outcomes. See the full methodology for the exact formula.
No. The GCR Rating is a separate score (out of 5, to three decimals) computed from verified review rating, volume and recency using a Bayesian model — not a simple star average. Two oncology & cancer clinics with the same Google star rating can end up with different GCR Ratings once volume and recency are factored in.
There's no fixed cutoff. GCR's Bayesian model pulls a clinic's average toward the oncology & cancer specialty-wide mean in proportion to how few verified reviews it has — so a clinic with limited review history starts near the typical score for the specialty and earns its way up or down as more verified reviews accumulate, rather than being excluded outright.
Rankings are refreshed on a regular cycle as new verified reviews come in, so an oncology & cancer clinic's position can move up or down over time as its underlying review data changes.
GCR ranks clinics it has verified review data for. If a clinic you're considering isn't listed, you can suggest it for review — GCR will look into adding it once enough verified patient data is available.
