Vesicoureter-reflux w reflux nephrop w hydrourt, unil

This diagnosis code signifies a condition where urine abnormally flows backward from the bladder into one ureter and kidney, leading to kidney damage (reflux nephropathy) and dilation of that same ureter (hydroureter). This unilateral presentation indicates that only one side of the urinary tract is affected by the reflux and its associated complications.

Use this code for patients diagnosed with vesicoureteral reflux (VUR) that has progressed to cause kidney scarring or damage, specifically when imaging studies (e.g., voiding cystourethrogram, renal ultrasound) confirm the presence of hydroureter on only one side. Documentation should clearly state the presence of reflux nephropathy and unilateral hydroureter in conjunction with VUR.

• Ensure documentation specifies "unilateral" involvement; bilateral involvement would require a different code.
• Distinguish from VUR without reflux nephropathy or hydroureter, which are coded differently.
• Sequence this code after any underlying cause of the VUR, if known and clinically relevant.