| ERN BOND | European Reference Network on bone disorders |
| ERN CRANIO | European Reference Network on craniofacial anomalies and ear, nose and throat (ENT) disorders |
| ERN-EuroBloodNet | European Reference Network on Rare Hematological Diseases |
| Endo-ERN | European Reference Network on endocrine conditionsm |
| ERN EpiCARE | European Reference Network on epilepsies |
| ERKNet | European Reference Network on kidney diseases |
| ERNICA | European Reference Network on inherited and congenital anomalies |
| ERN LUNG | European Reference Network on respiratory diseases |
| ERN Skin | European Reference Network on skin disorders |
| ERN EURACAN | European Reference Network on adult cancers (solid tumours) |
| ERN eUROGEN | European Reference Network on urogenital diseases and conditions |
| ERN EURO-NMD | European Reference Network on neuromuscular diseases |
| ERN EYE | European Reference Network on eye diseases |
| ERN GENTURIS | European Reference Network on genetic tumour risk syndromes |
| ERN GUARD-HEART | European Reference Network on diseases of the heart |
| ERN ITHACA | European Reference Network on congenital malformations and rare intellectual disability |
| MetabERN | European Reference Network on hereditary metabolic disorders |
| ERN PaedCan | European Reference Network on paediatric cancer (haemato-oncology) |
| ERN RARE-LIVER | European Reference Network on hepatological diseases |
| ERN ReCONNET | European Reference Network on connective tissue and musculoskeletal diseases |
| ERN RITA | European Reference Network on immunodeficiency, autoinflammatory and autoimmune diseases |
| ERN TRANSPLANT-CHILD | European Reference Network on Transplantation in Children |
| VASCERN | European Reference Network on Rare Multisystemic Vascular Diseases |
