Q90.1 Trisomy 21, mosaicism (mitotic nondisjunction)
Instructional Notes:
-
Q90.1
Description: Trisomy 21, mosaicism (mitotic nondisjunction)
↓
-
Q90
Description: Down syndrome
Use Additional Code:
- code(s) to identify any associated degree of intellectual disabilities (F70-F79)
Code Also: ['associated physical condition(s), such as atrioventricular septal defect (Q21.2-)']
↓
-
Q90-Q99
Description: Chromosomal abnormalities, not elsewhere classified (Q90-Q99)
Exclude2:
- mitochondrial metabolic disorders (E88.4-)
↓
-
Q00-Q99
Description: Congenital malformations, deformations and chromosomal abnormalities
Exclude2:
- inborn errors of metabolism (E70-E88)
Notes:
- Codes from this chapter are not for use on maternal records