Malignant neoplasm of bladder neck

This code signifies a cancerous tumor originating in the bladder neck, the narrow muscular opening at the base of the bladder that connects to the urethra. This malignancy is a type of urothelial carcinoma, which is the most common form of bladder cancer.

Use this code when documentation explicitly states a primary malignant neoplasm located at the bladder neck. This diagnosis is typically confirmed by biopsy and pathology reports. It is appropriate for initial diagnosis, treatment, and follow-up care for this specific anatomical site.

• Ensure documentation specifies "bladder neck" and not just "bladder" generally.
• Distinguish from benign neoplasms or carcinoma in situ of the bladder neck, which have different codes.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter.