ICD-10 chapter
Chapter XVII Congenital malformations, deformations and chromosomal abnormalities
Chapter XVII of ICD-10 is titled “Congenital malformations, deformations and chromosomal abnormalities”. It spans codes Q00–Q99, in 11 blocks.
What Chapter XVII excludes
Conditions that look similar but belong under another code.
- inborn errors of metabolism E70-E90
Blocks in Chapter XVII
- Q00–Q07Congenital malformations of the nervous system8 categories
- Q10–Q18Congenital malformations of eye, ear, face and neck9 categories
- Q20–Q28Congenital malformations of the circulatory system9 categories
- Q30–Q34Congenital malformations of the respiratory system5 categories
- Q35–Q37Cleft lip and cleft palate3 categories
- Q38–Q45Other congenital malformations of the digestive system8 categories
- Q50–Q56Congenital malformations of genital organs7 categories
- Q60–Q64Congenital malformations of the urinary system5 categories
- Q65–Q79Congenital malformations and deformations of the musculoskeletal system15 categories
- Q80–Q89Other congenital malformations9 categories
- Q90–Q99Chromosomal abnormalities, not elsewhere classified9 categories
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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