Chapter I of 22
Certain infectious and parasitic diseases
Codes A00–B99Category range as published by CMS
Search within ICD-10-CM — results across the whole code set will include categories A00–B99 from this chapter.
About this chapter
ICD-10-CM Chapter I — “Certain infectious and parasitic diseases” — spans every category from A00 through B99. 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.