Q91 Trisomy 18 and Trisomy 13
ICD-10-CM category Q91 sits in Chapter 17 (Congenital malformations, deformations and chromosomal abnormalities, Q00-Q99). It contains 8 billable codes for FY2027, effective October 1, 2026 to September 30, 2027. Always code to the most specific code available: a code with more characters that describes the diagnosis more precisely takes priority over a shorter one.
Billable codes in Q91
| Code | Description |
|---|---|
Q91.0 | Trisomy 18, nonmosaicism (meiotic nondisjunction) |
Q91.1 | Trisomy 18, mosaicism (mitotic nondisjunction) |
Q91.2 | Trisomy 18, translocation |
Q91.3 | Trisomy 18, unspecified |
Q91.4 | Trisomy 13, nonmosaicism (meiotic nondisjunction) |
Q91.5 | Trisomy 13, mosaicism (mitotic nondisjunction) |
Q91.6 | Trisomy 13, translocation |
Q91.7 | Trisomy 13, unspecified |
Search within ICD-10-CM for Q91 and related codes
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