| Field code | HUB_COUNT |
| Field description | Number of donors of the registry with the given HLA phenotype |
| Field type | Numeric Length: 5 |
| Field rule | |
| Dictionary field | Preliminary Search Results (Number of donors potentially matched to a patient's HLA genotype) |
| EMDIS messages |
PHEN_LIST |
| WMDA XML fields related to dictionary field |