Q90: Down syndrome useAdditionalCode code(s) to identify any associated physical conditions and degree of intellectual disabilities (F70-F79) |
| Q90.0: Trisomy 21, nonmosaicism (meiotic nondisjunction) |
| Q90.1: Trisomy 21, mosaicism (mitotic nondisjunction) |
| Q90.2: Trisomy 21, translocation |
| Q90.9: Down syndrome, unspecified |