Chapter IX of 22
Diseases of the circulatory system
Codes I00–I99Category range as published by CMS
Search within ICD-10-CM — results across the whole code set will include categories I00–I99 from this chapter.
About this chapter
ICD-10-CM Chapter IX — “Diseases of the circulatory system” — spans every category from I00 through I99. 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.