Current
Q91 — Trisomy 18 and Trisomy 13
Part of Chapter 17: Congenital malformations, deformations, chromosomal abnormalities, and genetic disorders , block Chromosomal abnormalities, not elsewhere classified (Q90-Q99) .
Child Codes
- Q91.0 Trisomy 18, nonmosaicism (meiotic nondisjunction) Billable
- Q91.1 Trisomy 18, mosaicism (mitotic nondisjunction) Billable
- Q91.2 Trisomy 18, translocation Billable
- Q91.3 Trisomy 18, unspecified Billable
- Q91.4 Trisomy 13, nonmosaicism (meiotic nondisjunction) Billable
- Q91.5 Trisomy 13, mosaicism (mitotic nondisjunction) Billable
- Q91.6 Trisomy 13, translocation Billable
- Q91.7 Trisomy 13, unspecified Billable
FY 2027 effective October 1, 2026 · CDC NCHS and CMS