| Field code | ALTER_REQ_TYPE |
| Field description | Workup request type - alternative |
| Field type | Alphanumeric Length: 4 |
| Field rule | PBSC = Request a PBSC collection SCD = Request the workup of a stem cell donor CBU = Request a cord blood unit |
| Dictionary field | Alternative workup request type (Requesting TC/registry's alternative (second) product preference) |
| EMDIS messages |
WOR_REQ |
| WMDA XML fields related to dictionary field |