Malignant carcinoid tumor of the stomach

This code signifies a malignant neuroendocrine tumor originating in the stomach, specifically a carcinoid tumor. These tumors arise from enterochromaffin-like cells and can produce various hormones, though gastric carcinoids are often non-functional. The malignancy indicates invasive or metastatic potential.

Assign this code when documentation confirms a primary malignant carcinoid tumor located within the stomach. This diagnosis is typically established through biopsy and histopathological examination. Use this code for both primary diagnosis and when managing complications or follow-up care related to the gastric carcinoid malignancy.

• Differentiate from benign gastric carcinoids (D3A.020) or uncertain behavior (D3A.092).
• Specify the exact location within the stomach if further detail is available (e.g., fundus, antrum) using more specific codes if applicable.
• Code any associated metastatic sites separately, linking them to the primary gastric malignancy.