Malignant neoplasm of ascending colon

This code signifies a primary cancerous tumor originating in the ascending segment of the large intestine. This malignancy involves uncontrolled growth of abnormal cells within the colonic tissue, specifically in the portion extending from the cecum to the hepatic flexure.

Assign this code when documentation clearly indicates a primary malignant neoplasm located in the ascending colon. This diagnosis is typically confirmed through biopsy and pathology reports, often following colonoscopy or imaging studies. Use this code for the initial diagnosis and for subsequent encounters related to the primary site of the malignancy.

• Differentiate from other colon segments; ensure documentation specifies "ascending colon."
• Do not use for metastatic disease to the ascending colon; this code is for primary malignancy.
• Sequence according to the primary reason for the encounter, often as the principal diagnosis.