API:  http://id.who.int/icd/release/10/2010/H48
{
    "@context": "http://id.who.int/icd/contexts/contextForICD10Entity.json",
    "@id": "http://id.who.int/icd/release/10/2010/H48",
    "parent": [
        "http://id.who.int/icd/release/10/2010/H46-H48"
    ],
    "child": [
        "http://id.who.int/icd/release/10/2010/H48.0",
        "http://id.who.int/icd/release/10/2010/H48.1",
        "http://id.who.int/icd/release/10/2010/H48.8"
    ],
    "browserUrl": "http://apps.who.int/classifications/icd10/browse/2010/en#/H48",
    "code": "H48",
    "title": {
        "@language": "en",
        "@value": "Disorders of optic [2nd] nerve and visual pathways in diseases classified elsewhere"
    },
    "usage": "aster",
    "classKind": "category"
}
Title: Disorders of optic [2nd] nerve and visual pathways in diseases classified elsewhere
Code:  H48

Child

1.  http://id.who.int/icd/release/10/2010/H48.0
2.  http://id.who.int/icd/release/10/2010/H48.1
3.  http://id.who.int/icd/release/10/2010/H48.8