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ICD-10-CM Diagnosis Codes →
section notes
17. Congenital malformations, deformations and chromosomal abnormalities (Q00-Q99) →
section notes
Q90-Q99 Chromosomal abnormalities, not elsewhere classified (Q90-Q99) →
section notes
Q90 Down syndrome →
section notes
Q90.0   Trisomy 21, nonmosaicism (meiotic nondisjunction)
Q90.1   Trisomy 21, mosaicism (mitotic nondisjunction)
Q90.2   Trisomy 21, translocation
Q90.9   Down syndrome, unspecified
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