Carcinoma in situ of rectosigmoid junction

📋Clinical Description

This code represents the presence of abnormal, pre-cancerous cells confined to the innermost layer of the tissue at the junction where the rectum meets the sigmoid colon. These cells have not invaded deeper tissues and are considered non-invasive, but have the potential to become malignant if left untreated.

🎯When to Use

This code is appropriate when pathology reports confirm carcinoma in situ specifically located at the rectosigmoid junction. Documentation should clearly state "carcinoma in situ" or "intramucosal carcinoma" and specify the rectosigmoid junction as the site.

💡Coding Tips

Differentiate from malignant neoplasms (C19) which involve invasion beyond the basement membrane.
Do not use for adenomas or polyps without a confirmed diagnosis of carcinoma in situ.
Ensure the pathology report explicitly identifies the rectosigmoid junction as the precise location.

AI-generated reference — verify against official guidelines

Code Hierarchy

▲D01Carcinoma in situ of other and unspecified digestive organs

D01.1(current)

Crosswalks

230.4ApproxICD-9 230.4ApproxICD-9

Same Category

D01Carcinoma in situ of other and unspecified digestive organs D01.0Carcinoma in situ of colon D01.2Carcinoma in situ of rectum D01.3Carcinoma in situ of anus and anal canal