ICD-10 diagnosis code

Q99 Other chromosome abnormalities, not elsewhere classified

Q99 is the ICD-10 code for Other chromosome abnormalities, not elsewhere classified. It is a three-character category divided into 5 subcodes; use the subcode whenever the record supports that level of detail. It belongs to the block Q90–Q99 (Chromosomal abnormalities, not elsewhere classified) in Chapter XVII, Congenital malformations, deformations and chromosomal abnormalities.

Code type: Category (3 characters)
Chapter: XVII · Q00–Q99
Classification: WHO ICD-10, 2019 version

Subcodes of Q99

Q99 in national editions

Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.

SwedenICD-10-SE

Q99Andra kromosomavvikelser som ej klassificeras på annan plats

DenmarkICD-10-DK

DQ99Andre kønskromosomanomalier IKA

FinlandICD-10-FI

Q99Muualla luokittamattomat kromosomipoikkeavuudet

GermanyICD-10-GM

Q99Sonstige Chromosomenanomalien, anderenorts nicht klassifiziert

FranceICD-10-FR

Q99Autres anomalies des chromosomes, non classées ailleurs

NetherlandsICD-10-NL

Q99overige chromosoomafwijkingen, niet elders geclassificeerd

Based on the World Health Organization’s International Statistical Classification of Diseases and Related Health Problems, 10th revision (ICD-10), 2019 version, and the national editions published by each country’s health authority. This page is a reference, not coding advice; follow your national coding rules when you report.

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