Congenital diverticulum of bladder

This code signifies a congenital outpouching or sac-like protrusion from the wall of the urinary bladder, present at birth. These diverticula are typically caused by a weakness in the bladder wall during fetal development, leading to herniation of the bladder mucosa through the muscular layers.

Apply this code when documentation clearly indicates a diagnosis of a bladder diverticulum that is explicitly stated as congenital in origin. Supporting documentation would include physician notes, imaging reports (e.g., cystogram, ultrasound), or surgical reports confirming the presence and congenital nature of the diverticulum.

• Differentiate from acquired bladder diverticula, which have different ICD-10-CM codes.
• Ensure the documentation specifies "congenital" to avoid miscoding.
• Code any associated urinary tract infections or other complications separately.