Congenital bladder neck obstruction

This code signifies a birth defect where the opening of the bladder into the urethra is abnormally narrowed or blocked. This obstruction impedes the normal flow of urine from the bladder, potentially leading to urinary retention, hydronephrosis, and recurrent urinary tract infections.

Apply this code for congenital malformations specifically affecting the bladder neck, resulting in functional or anatomical obstruction. Documentation should clearly state "congenital bladder neck obstruction" or describe a similar anomaly present at birth. This code is appropriate when the obstruction is the primary diagnosis or a significant co-morbidity.

• Differentiate from acquired bladder neck obstructions, which are coded differently.
• Ensure documentation specifies "congenital" to support this code.
• Consider additional codes for associated conditions like hydronephrosis (N13.x) or urinary tract infections (N39.0).