Malignant neoplasm of Meckel's diverticulum

This code signifies a primary cancerous tumor originating within a Meckel's diverticulum, which is a congenital outpouching of the small intestine, typically the ileum. These neoplasms are rare and can be of various histological types, including adenocarcinoma, carcinoid, or sarcoma.

Use this code when documentation clearly indicates a malignant neoplasm specifically arising from a Meckel's diverticulum. This diagnosis is often made incidentally during surgery for complications like bleeding or obstruction, or during pathological examination of resected tissue. Supporting documentation includes pathology reports confirming malignancy and the origin within the diverticulum.

• Ensure the pathology report explicitly states the malignancy originated in the Meckel's diverticulum, not an adjacent small bowel segment.
• Do not confuse with secondary malignancies or benign tumors of Meckel's diverticulum.
• Sequence as the primary diagnosis when the malignancy is the reason for the encounter; otherwise, it may be a secondary diagnosis.