Q912026
Non-billable
Trisomy 18 and Trisomy 13
Clinical Notes
Frequently Asked Questions
Code Hierarchy
Chromosomal abnormalities, not elsewhere classified (Q90-Q99)
Down syndrome
Q91
Trisomy 18 and Trisomy 13...18, nonmosaicism (meiotic nondisjunction)
...18, mosaicism (mitotic nondisjunction)
...18, translocation
...18, unspecified
Trisomy 13, nonmosaicism (meiotic nondisjunction)
Trisomy 13, mosaicism (mitotic nondisjunction)
Trisomy 13, translocation
Trisomy 13, unspecified
Other trisomies and partial trisomies of the autosomes, not elsewhere classified
Monosomies and deletions from the autosomes, not elsewhere classified
Balanced rearrangements and structural markers, not elsewhere classified
Turner's syndrome
Other sex chromosome abnormalities, female phenotype, not elsewhere classified
Other sex chromosome abnormalities, male phenotype, not elsewhere classified
Other chromosome abnormalities, not elsewhere classified
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165,808 Medicare hospitalizations across 1 DRG for codes in Q91
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Official Guidelines
Chapter 17: Congenital Malformations
Official coding guidelines for Q00-Q99