In simple words: This code describes a condition where urine flows backward from the bladder to one kidney, causing damage to that kidney.There is no swelling of the tube connecting the kidney and bladder.

This ICD-10-CM code, N13.721, signifies unilateral vesicoureteral reflux (VUR) accompanied by reflux nephropathy but without hydroureter.VUR is the backward flow of urine from the bladder into the ureters and kidneys. Reflux nephropathy is kidney damage caused by this reflux.The "unilateral" specification indicates that the condition affects only one kidney. The absence of hydroureter means there's no dilation of the ureter.

Example 1: A 5-year-old girl presents with recurrent urinary tract infections (UTIs). Imaging studies reveal unilateral vesicoureteral reflux with mild reflux nephropathy.No hydroureter is present., A 10-year-old boy is diagnosed with VUR after a voiding cystourethrogram.Renal ultrasound shows mild scarring in one kidney consistent with reflux nephropathy, but no dilation of the ureter. He has no history of UTIs., A newborn infant screened for VUR shows unilateral reflux and mild renal scarring on ultrasound. Further workup is needed to assess kidney function and determine the severity of reflux nephropathy.

* Detailed patient history, including symptoms (UTIs, frequency, urgency, incontinence).* Physical examination findings.* Results of imaging studies (voiding cystourethrogram, renal ultrasound).* Renal function tests (e.g., creatinine, GFR).* Urinalysis and urine culture results.

** This code is specific to unilateral involvement.Always verify the laterality of the condition to ensure accurate coding. Consider the severity of renal scarring when determining the level of clinical concern.