Hydroureter

This code represents hydroureter, a condition characterized by the abnormal dilation or distension of the ureter due to the accumulation of urine. This enlargement is typically caused by an obstruction preventing the normal flow of urine from the kidney to the bladder, leading to a backup and subsequent widening of the ureteral lumen.

Use this code when documentation clearly indicates the presence of hydroureter, regardless of the underlying cause. This includes scenarios where imaging studies (e.g., ultrasound, CT scan, MRI) report ureteral dilation. It is appropriate for both unilateral and bilateral hydroureter.

• Always code the underlying cause of the hydroureter (e.g., ureteral calculus, stricture, tumor) first, if known and documented.
• Distinguish from hydronephrosis; while often co-occurring, hydroureter specifically refers to ureteral dilation.
• Ensure documentation specifies "hydroureter" and not just "dilated ureter" without further context, although in practice, these terms are often used interchangeably to describe the same condition.