Q91 is the ICD-10 code for Edwards syndrome and Patau syndrome. It is a three-character category divided into 8 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 Q91
- Q91.0Trisomy 18, meiotic nondisjunction
- Q91.1Trisomy 18, mosaicism (mitotic nondisjunction)
- Q91.2Trisomy 18, translocation
- Q91.3Edwards syndrome, unspecified
- Q91.4Trisomy 13, meiotic nondisjunction
- Q91.5Trisomy 13, mosaicism (mitotic nondisjunction)
- Q91.6Trisomy 13, translocation
- Q91.7Patau syndrome, unspecified
Q91 in national editions
Countries report with their own edition of ICD-10. Most keep the WHO code and add more specific codes beneath it.
DQ91Edwards og Pataus syndromer
Q91Edwardsin oireyhtymä ja Pataun oireyhtymä
Q91Edwards-Syndrom und Patau-Syndrom
Q91Syndrome d'Edwards et syndrome de Patau
Q91syndromen van Edwards en van Patau
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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