Malignant neoplasm of other specified sites of small intestine

This code signifies a cancerous tumor originating in a specific, but not otherwise classified, region of the small intestine. This includes malignant neoplasms of the duodenum, jejunum, or ileum, excluding those specifically designated as unspecified or overlapping sites.

Apply this code when documentation clearly indicates a primary malignant neoplasm of a specified small intestinal segment, such as the jejunum or ileum, but not an overlapping lesion or one of an unspecified site. Supporting documentation would include pathology reports confirming malignancy and operative notes or imaging identifying the precise location within the small bowel.

• Ensure the documentation specifies a particular segment of the small intestine (e.g., jejunum, ileum) and not an unspecified or overlapping site.
• Differentiate from codes for malignant neoplasms of unspecified parts of the small intestine or overlapping sites, which have distinct ICD-9-CM codes.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter, followed by any relevant secondary diagnoses.