Malignant carcinoid tumor of the lg int, unsp portion

This code signifies a neuroendocrine tumor originating in the large intestine, characterized by its malignant nature and the production of bioactive substances. These tumors, often slow-growing, can metastasize and cause a variety of symptoms depending on their location and hormone secretion. The "unspecified portion" indicates that the exact segment of the large intestine affected is not documented.

Use this code when the medical record clearly documents a malignant carcinoid tumor of the large intestine, but the specific anatomical site (e.g., cecum, ascending colon, transverse colon, descending colon, sigmoid colon, rectum) within the large intestine is not specified. This code is appropriate for initial diagnoses, follow-up care, and when documenting the primary site of a metastatic carcinoid tumor if the primary site is confirmed to be the large intestine but not further localized.

• Always strive for greater specificity regarding the exact location within the large intestine (e.g., C7A.020-C7A.028) if documented.
• Do not use this code if the tumor is benign or of uncertain behavior; refer to D3A.02-.
• Code any associated carcinoid syndrome (E34.0) separately.