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

This code represents a finding on a cervical cytology (Pap test) indicating the presence of squamous cells that are abnormal but do not clearly meet the criteria for a low-grade or high-grade squamous intraepithelial lesion (LSIL or HSIL). It signifies an equivocal result that requires further evaluation or follow-up.

This code is used when a Pap test report specifically states "Atypical Squamous Cells of Undetermined Significance (ASC-US)." It should be assigned when the provider documents this specific cytology result from a screening or diagnostic cervical smear.

• Do not use this code if the cytology report specifies ASC-H (atypical squamous cells, cannot exclude HSIL) or any definitive squamous intraepithelial lesion (LSIL, HSIL).
• This code is often followed by codes for subsequent diagnostic procedures, such as colposcopy (e.g., Z12.4 for screening for malignant neoplasm of cervix).
• Ensure the documentation clearly states "ASC-US" from a cervical cytologic smear.