| Code | Description |
|---|---|
| Q900 | Trisomy 21, meiotic nondisjunction |
| Q901 | Trisomy 21, mosaicism (mitotic nondisjunction) |
| Q902 | Trisomy 21, translocation |
| Q909 | Down's syndrome, unspecified |
Heading of aggregated item CIM-10 (en) to which it belongs
Q90-Q99 Chromosomal abnormalities, not elsewhere classified