ICD-10-CM · Chapter 17 · Q00-QA1
Q91 Trisomy 18 and Trisomy 13
Subcodes
Subcodes are listed below for reference. Detail pages are not available for chapters 11–22.
| Code | Description | Billable |
|---|---|---|
| Q91..0 | Trisomy 18, nonmosaicism (meiotic nondisjunction) | Yes |
| Q91..1 | Trisomy 18, mosaicism (mitotic nondisjunction) | Yes |
| Q91..2 | Trisomy 18, translocation | Yes |
| Q91..3 | Trisomy 18, unspecified | Yes |
| Q91..4 | Trisomy 13, nonmosaicism (meiotic nondisjunction) | Yes |
| Q91..5 | Trisomy 13, mosaicism (mitotic nondisjunction) | Yes |
| Q91..6 | Trisomy 13, translocation | Yes |
| Q91..7 | Trisomy 13, unspecified | Yes |
Last reviewed: September 2026