Chapter XXII of 22
Codes for special purposes
Codes U00–U85Category range as published by CMS
Search within ICD-10-CM — results across the whole code set will include categories U00–U85 from this chapter.
About this chapter
ICD-10-CM Chapter XXII — “Codes for special purposes” — spans every category from U00 through U85. 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.