API:  http://id.who.int/icd/release/10/2010/U89
{
    "@context": "http://id.who.int/icd/contexts/contextForICD10Entity.json",
    "@id": "http://id.who.int/icd/release/10/2010/U89",
    "parent": [
        "http://id.who.int/icd/release/10/2010/U80-U89"
    ],
    "child": [
        "http://id.who.int/icd/release/10/2010/U89.8",
        "http://id.who.int/icd/release/10/2010/U89.9"
    ],
    "browserUrl": "http://apps.who.int/classifications/icd10/browse/2010/en#/U89",
    "code": "U89",
    "title": {
        "@language": "en",
        "@value": "Agent resistant to other and unspecified antibiotics"
    },
    "classKind": "category"
}
Title: Agent resistant to other and unspecified antibiotics
Code:  U89

Child

1.  http://id.who.int/icd/release/10/2010/U89.8
2.  http://id.who.int/icd/release/10/2010/U89.9