Q91 is a non-billable/non-specific diagnosis code from the 2026 ICD-10-CM used to classify the following condition: Trisomy 18 and Trisomy 13.
Codes
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
Versions
2026
No changes
2025
No changes
2024
No changes
2023
No changes
2022
No changes
2021
No changes
2020
No changes
2019
No changes
2018
No changes
2017
No changes
2016
New code