Atyp squam cell of undet signfc cyto smr vagn (ASC-US)

This code signifies the presence of atypical squamous cells of undetermined significance (ASC-US) identified during a cytologic examination (Pap smear) of the vaginal canal. ASC-US indicates that some squamous cells appear abnormal but do not clearly show a high-grade lesion or malignancy, making their significance uncertain. It is a common finding that often requires further investigation.

Use this code when a pathology report for a vaginal cytologic smear explicitly states a finding of "Atypical Squamous Cells of Undetermined Significance (ASC-US)." This typically occurs as a follow-up to an abnormal cervical Pap smear or as part of routine gynecological screening when the sample is specifically from the vagina. Documentation must clearly specify the vaginal origin of the cells.

• Ensure the pathology report specifies "vaginal" cytology; if the finding is from the cervix, a different code (e.g., R87.610) should be used.
• This code represents an abnormal finding, not a definitive diagnosis of dysplasia or cancer.
• Do not use this code for findings of atypical glandular cells (AGC) or low-grade/high-grade squamous intraepithelial lesions (LSIL/HSIL), as these have distinct codes.