ICD-10 / XVII Congenital malformations, deformations and chromosomal abnormalities / Q90-Q99 Chromosomal abnormalities, not elsewhere classified / Q99 Other chromosome abnormalities, not elsewhere classifiedFrom parent levelsChapterXVIICongenital malformations, deformations and chromosomal abnormalitiesexc.OpenExclusionsinborn errors of metabolism (E70-E90)BlockQ90-Q99Chromosomal abnormalities, not elsewhere classifiedOpenQ99CategoryResidualBlock Q90-Q99Chapter XVIIOther chromosome abnormalities, not elsewhere classifiedSubcategories