Atyp squam cell not excl hi grd intrepith lesn cyto smr anus

This code signifies a finding from an anal cytology smear indicating atypical squamous cells where a high-grade squamous intraepithelial lesion (HSIL) cannot be ruled out. This is an abnormal screening result suggesting a potential precursor to anal cancer, requiring further investigation.

This code is used when an anal Pap test or cytology report specifically states "ASC-H" or "Atypical Squamous Cells, cannot exclude HSIL." It is typically encountered in patients undergoing anal cancer screening, particularly those at higher risk such as individuals with HIV or a history of receptive anal intercourse.

• Ensure the pathology report explicitly documents "ASC-H" for anal cytology.
• Do not confuse this with ASC-US (atypical squamous cells of undetermined significance) or other specific types of anal dysplasia.
• This code represents a screening finding; subsequent definitive diagnoses (e.g., HSIL, anal cancer) will supersede this code once confirmed.