Carcinoma in situ of other parts of cervix

This code signifies the presence of carcinoma in situ (CIS) affecting parts of the cervix not otherwise specified, such as the endocervix or exocervix when a more precise location isn't documented. CIS represents a pre-invasive, high-grade squamous intraepithelial lesion (HSIL) where abnormal cells are confined to the epithelial layer without invasion into the underlying stroma.

Use this code when pathology reports confirm carcinoma in situ of the cervix, and the specific subsite (e.g., endocervix, exocervix) is not detailed or the lesion spans multiple unspecified areas. Documentation should clearly state "carcinoma in situ" or "CIS" of the cervix, with no evidence of stromal invasion.

• Differentiate from D06.0 (endocervix) and D06.1 (exocervix) when a more specific site is documented.
• Ensure the pathology report explicitly states "in situ" to avoid coding invasive carcinoma.
• This code is for the primary diagnosis of CIS; do not use for screening or follow-up without a confirmed diagnosis.