Q90 — ICD-10-CM Diagnosis Codes

• Q90 Down syndrome
• Q90.0 Trisomy 21, nonmosaicism (meiotic nondisjunction) billable
• Q90.1 Trisomy 21, mosaicism (mitotic nondisjunction) billable
• Q90.2 Trisomy 21, translocation billable
• Q90.9 Down syndrome, unspecified billable