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Q903-char group

Down syndrome

⇄ Primary-code rule changed vs QĐ4469

Coding rules (TT06)

  • ●Avoid — more specific 4-5 char codes exist (see below)

Codes within Q90

Q90.0Trisomy 21, meiotic nondisjunctionQ90.1Trisomy 21, mosaicism (mitotic nondisjunction)Q90.2Trisomy 21, translocationQ90.9Down syndrome, unspecified