ICD-10-CM Book 2026 Edition

Chapters  /  Chapter 17  /  Q90-Q99  /  Q99
Q99 Other chromosome abnormalities, not elsewhere classified
Q99.0 Chimera 46, XX/46, XY
Chimera 46, XX/46, XY true hermaphrodite
Q99.1 46, XX true hermaphrodite
46, XX with streak gonads
46, XY with streak gonads
Pure gonadal dysgenesis
Q99.2 Fragile X chromosome
Fragile X syndrome
Q99.8 Other specified chromosome abnormalities
Q99.81 Usher syndrome
UseAdditionalCode code to identify any auditory and visual manifestations
Q99.811 Usher syndrome, type 1
Q99.812 Usher syndrome, type 2
Q99.813 Usher syndrome, type 3
Q99.818 Other Usher syndrome
Usher syndrome, type 4
Q99.819 Usher syndrome, unspecified
Q99.89 Other specified chromosome abnormalities
Q99.9 Chromosomal abnormality, unspecified