Carcinoma in situ of other specified digestive organs

This code signifies the presence of abnormal, non-invasive cancerous cells confined to the epithelial layer of digestive organs other than those specifically classified elsewhere (e.g., esophagus, stomach, colon). These cells have not invaded deeper tissues or spread to other parts of the body. It represents a pre-invasive stage of cancer.

Use this code when documentation specifies carcinoma in situ found in digestive organs such as the small intestine, appendix, liver, gallbladder, bile ducts, or pancreas. This diagnosis is typically confirmed by biopsy and pathology reports indicating intraepithelial neoplasia without evidence of invasion.

• Ensure the documentation explicitly states "in situ" and specifies a digestive organ not covered by more specific D01 codes (e.g., D01.0-D01.6).
• Do not use this code if invasion beyond the basement membrane is noted; instead, refer to the appropriate malignant neoplasm codes (C codes).
• Carefully review the pathology report to confirm the exact site and the "in situ" nature of the carcinoma.