Malignant neoplasm of intestinal tract, part unspecified

This code signifies a primary cancerous tumor originating within the intestinal tract when the specific segment (e.g., small intestine, large intestine, rectum) is not documented. It indicates a confirmed malignancy without further anatomical precision.

Apply this code when the pathology report or physician's documentation confirms a malignant neoplasm of the intestine but does not specify the exact location. This is often used in preliminary diagnoses or when the precise site is still under investigation.

• Avoid using this code if a more specific anatomical site within the intestinal tract is documented (e.g., C17.- for small intestine, C18.- for colon).
• Always query the provider for a more specific site if possible, as this code implies a lack of detailed information.
• Sequence this code as the primary diagnosis when it represents the reason for the encounter or treatment.