Alphabetic Index · main term
AIN
AIN is a main term in the FY2027 ICD-10-CM Alphabetic Index (Index to Diseases and Injuries). It is a cross-reference: the Index sends you to Neoplasia, intraepithelial, anal, which lists K62.82. Confirm the code in the Tabular List before you report it.
Where the Index sends you
see Neoplasia, intraepithelial (histologically confirmed), anal (AIN) (histologically confirmed)
Dysplasia of anus