Malignant neoplasm of lateral wall of bladder

This code signifies a cancerous tumor originating in the muscular or mucosal lining of the lateral wall of the urinary bladder. It indicates a primary malignancy, meaning the cancer started in this specific location rather than spreading from another site.

Assign this code when documentation clearly specifies a malignant neoplasm confined to or originating from the lateral wall of the bladder. This is typically supported by pathology reports from biopsy or surgical resection, imaging studies, and physician notes detailing the tumor's exact location.

• Ensure the documentation specifies "lateral wall" and not a more general bladder location.
• Distinguish from secondary malignancies or carcinoma in situ, which have different codes.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter.