Q91 is a non-billable/non-specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Trisomy 18 and Trisomy 13.
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Trisomy 18, nonmosaicism (meiotic nondisjunction)
Trisomy 18, mosaicism (mitotic nondisjunction)
Trisomy 18, translocation
Trisomy 18, unspecified
Trisomy 13, nonmosaicism (meiotic nondisjunction)
Trisomy 13, mosaicism (mitotic nondisjunction)
Trisomy 13, translocation
Trisomy 13, unspecified
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