Malignant neoplasm of posterior wall of urinary bladder

This code signifies a primary cancerous tumor originating in the posterior wall of the urinary bladder. It indicates an uncontrolled growth of abnormal cells specifically located in the back portion of the bladder's internal lining or muscular layers.

Apply this code when documentation clearly specifies a malignant neoplasm with its primary site identified as the posterior wall of the bladder. This is typically supported by pathology reports, operative notes detailing tumor location, or imaging studies confirming the specific bladder wall involvement.

• Ensure the documentation specifies "malignant" and not benign or uncertain behavior.
• Verify the exact location within the bladder; other codes exist for different bladder wall sites.
• Sequence as the primary diagnosis when the bladder cancer is the reason for the encounter, followed by any metastases.