U.S. ICD-10-CM reference · FY2027
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Q91Category · further specificity requiredCurrent

Trisomy 18 and Trisomy 13

HierarchyQ90-Q99 · Q91

Code-level instructions

No additional notes.

Inherited instructions

Chapters 17 · Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders (Q00-QA1)

Excludes 2

inborn errors of metabolism (E70-E88)

Note

Codes from this chapter are not for use on maternal records

Q90-Q99 · Chromosomal abnormalities, not elsewhere classified (Q90-Q99)

Excludes 2

mitochondrial metabolic disorders (E88.4-)

More specific codes

Q91.0Trisomy 18, nonmosaicism (meiotic nondisjunction)Billable / specificQ91.1Trisomy 18, mosaicism (mitotic nondisjunction)Billable / specificQ91.2Trisomy 18, translocationBillable / specificQ91.3Trisomy 18, unspecifiedBillable / specificQ91.4Trisomy 13, nonmosaicism (meiotic nondisjunction)Billable / specificQ91.5Trisomy 13, mosaicism (mitotic nondisjunction)Billable / specificQ91.6Trisomy 13, translocationBillable / specificQ91.7Trisomy 13, unspecifiedBillable / specific
Code edition