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. It represents a primary malignancy, meaning the cancer started in this specific anatomical location rather than spreading from another site.

Apply this code when documentation clearly states a primary malignant neoplasm of the bladder neck. This includes confirmed diagnoses from pathology reports, operative notes describing tumor excision from this area, or physician notes explicitly identifying the bladder neck as the primary site of malignancy.

• Ensure documentation specifies "bladder neck" and not a more general bladder site (e.g., dome, lateral wall) to avoid over-specificity.
• Distinguish from secondary malignancies or carcinoma in situ of the bladder neck, which have different ICD-10-CM codes.
• Always review the pathology report for definitive confirmation of malignancy and precise anatomical location within the bladder.