Q91.3

Trisomy 18, unspecified

Billable / specificPOA exempt

Q91.3 is a billable, specific ICD-10-CM code that can be used to indicate a diagnosis for reimbursement purposes in FY2027.

Inclusion terms

Includes (from Q91)

  • 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) (from Q91)
  • mitochondrial metabolic disorders (E88.4-) (from Q91)

Also known as

  • Syndrome, trisomy, 18
  • Trisomy, 18

Parent code

  • Q91Trisomy 18 and Trisomy 13Header

Related codes

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

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