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ICD-10 diagnosis code

Q99.8 Other specified chromosome abnormalities

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Q99.8 is the ICD-10 code for Other specified chromosome abnormalities. It is a four-character subcategory of Q99 (Other chromosome abnormalities, not elsewhere classified), the most specific level in the WHO edition. It belongs to the block Q90–Q99 (Chromosomal abnormalities, not elsewhere classified) in Chapter XVII, Congenital malformations, deformations and chromosomal abnormalities.

Code type
Subcategory (4 characters)
Chapter
XVII · Q00–Q99
Classification
WHO ICD-10, 2019 version

Q99.8 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

Q99.8Andra specificerade kromosomavvikelser

NorwayICD-10-NO

Q99.8Annet spesifisert kromosomavvik

DenmarkICD-10-DK

DQ998Anden kromosomanomali

FinlandICD-10-FI

Q99.8Muu määritetty kromosomipoikkeavuus

GermanyICD-10-GM

Q99.8Sonstige näher bezeichnete Chromosomenanomalien

FranceICD-10-FR

Q99.8Autres anomalies précisées des chromosomes

NetherlandsICD-10-NL

Q99.8overige gespecificeerde chromosoomafwijkingen

United StatesICD-10-CM

Listed through more specific codes:

  • Q99.89Other specified chromosome abnormalities

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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