Carcinoma in situ of cervix, unspecified

This code represents the presence of abnormal, pre-cancerous cells confined to the surface lining of the cervix, without invasion into deeper tissues. It signifies a high-grade squamous intraepithelial lesion (HSIL) or adenocarcinoma in situ (AIS) where the specific type or location within the cervix is not documented. This condition is considered a direct precursor to invasive cervical cancer.

Use this code when documentation confirms carcinoma in situ of the cervix, but the specific histological type (e.g., squamous, glandular) or precise anatomical subsite (e.g., endocervix, exocervix) is not specified. This code is appropriate for pathology reports indicating "carcinoma in situ, NOS" or "cervical intraepithelial neoplasia grade III (CIN III)" without further detail.

• Do not use if the specific type of carcinoma in situ (e.g., squamous, glandular) is documented; instead, choose a more specific D06 subcategory.
• Distinguish from cervical dysplasia (N87.-) which represents less severe cellular changes.
• Sequence as a primary diagnosis when the carcinoma in situ is the reason for the encounter or treatment.