| Q00-Q07 | Congenital malformations of the nervous system |
| Q10-Q18 | Congenital malformations of eye, ear, face and neck |
| Q20-Q28 | Congenital malformations of the circulatory system |
| Q30-Q34 | Congenital malformations of the respiratory system |
| Q35-Q37 | Cleft lip and cleft palate |
| Q38-Q45 | Other congenital malformations of the digestive system |
| Q50-Q56 | Congenital malformations of genital organs |
| Q60-Q64 | Congenital malformations of the urinary system |
| Q65-Q79 | Congenital malformations and deformations of the musculoskeletal system |
| Q80-Q89 | Other congenital malformations |
| Q90-Q99 | Chromosomal abnormalities, not elsewhere classified |
