Chapter XVII of 22
Congenital malformations, deformations and chromosomal abnormalities
Codes Q00–Q99Category range as published by CMS
Search within ICD-10-CM — results across the whole code set will include categories Q00–Q99 from this chapter.
About this chapter
ICD-10-CM Chapter XVII — “Congenital malformations, deformations and chromosomal abnormalities” — spans every category from Q00 through Q99. Each category in that range expands into a header code and one or more billable codes with additional specificity (laterality, episode of care, or clinical detail). Open any code’s own page to see its exact position in the hierarchy, its parent and children, and whether it’s billable.