Q91

Trisomy 18 and Trisomy 13

Non-billable header

Q91 is a non-billable header code. Use one of the more specific codes below.

Inclusion terms

Includes

  • Note: Codes from this chapter are not for use on maternal records

Excludes2

Not included here — may be reported together when both conditions exist.

  • inborn errors of metabolism (E70-E88)
  • mitochondrial metabolic disorders (E88.4-)

More specific codes Q91

  • Q91.0Trisomy 18, nonmosaicism (meiotic nondisjunction)Billable
  • Q91.1Trisomy 18, mosaicism (mitotic nondisjunction)Billable
  • Q91.2Trisomy 18, translocationBillable
  • Q91.3Trisomy 18, unspecifiedBillable
  • Q91.4Trisomy 13, nonmosaicism (meiotic nondisjunction)Billable
  • Q91.5Trisomy 13, mosaicism (mitotic nondisjunction)Billable
  • Q91.6Trisomy 13, translocationBillable
  • Q91.7Trisomy 13, unspecifiedBillable

Related codes

  • Q90Down syndromeHeader
  • Q92Other trisomies and partial trisomies of the autosomes, not elsewhere classifiedHeader
  • Q93Monosomies and deletions from the autosomes, not elsewhere classifiedHeader
  • Q95Balanced rearrangements and structural markers, not elsewhere classifiedHeader
  • Q96Turner's syndromeHeader
  • Q97Other sex chromosome abnormalities, female phenotype, not elsewhere classifiedHeader
  • Q98Other sex chromosome abnormalities, male phenotype, not elsewhere classifiedHeader
  • Q99Other chromosome abnormalities, not elsewhere classifiedHeader

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