N13.739 Vesicoureteral-reflux with reflux nephropathy with hydroureter, unspecified

Name of the Condition

• Vesicoureteral reflux with reflux nephropathy with hydroureter, unspecified (ICD-10-CM: N13.739)

Summary

Vesicoureteral reflux (VUR) with reflux nephropathy and hydroureter, unspecified, is a condition where urine flows backward from the bladder into the ureters and kidneys, leading to kidney damage (reflux nephropathy) and ureteral swelling (hydroureter). This occurs due to a malfunction of the valve-like mechanism at the ureter-bladder junction, which fails to prevent backflow. The combination of kidney scarring and ureteral dilation distinguishes this condition from uncomplicated VUR. The unspecified designation indicates the condition affects one or both sides of the urinary tract without further specification.

Causes

The primary cause is an abnormal ureterovesical junction, where the valve mechanism fails to prevent urine from flowing backward into the ureters and kidneys. This can result from congenital defects, such as a short or poorly developed ureteral tunnel, or acquired factors like bladder outlet obstruction or neurogenic bladder. Persistent reflux over time leads to kidney damage (nephropathy) and ureteral dilation (hydroureter).

Risk Factors

• Congenital urinary tract abnormalities
• Family history of vesicoureteral reflux
• Recurrent urinary tract infections
• Neurogenic bladder or bladder dysfunction
• Conditions causing increased bladder pressure (e.g., posterior urethral valves)
• Prior urinary tract surgery or trauma

Symptoms

• Recurrent urinary tract infection
• Flank pain or abdominal discomfort
• Hematuria (blood in urine)
• Urinary urgency or frequency
• Fever (especially in children)
• Hydronephrosis (kidney swelling)

Diagnosis

Diagnosis typically involves imaging studies to evaluate the urinary tract. Voiding cystourethrography (VCUG) or radionuclide cystography (RNC) confirms VUR by visualizing backflow during urination. Ultrasound assesses kidney size, scarring, and ureteral dilation. Additional tests, such as renal scintigraphy, may quantify kidney function and detect reflux nephropathy. Urine cultures identify infections, and blood tests evaluate kidney function (e.g., creatinine, BUN).

Treatment Options

Treatment focuses on preventing complications and managing symptoms. Antibiotics may be prescribed to prevent recurrent infections. Surgical options include ureteral reimplantation to correct the valve mechanism or endoscopic injection of bulking agents to improve ureter-bladder junction function. In severe cases, nephrectomy (kidney removal) may be considered if kidney damage is extensive. Regular monitoring of kidney function and urinary tract health is essential.

Prognosis and Follow-Up

Prognosis depends on the severity of kidney damage and response to treatment. Early intervention can reduce the risk of progressive kidney injury and complications. Follow-up typically includes periodic imaging (e.g., ultrasound) and urine tests to monitor for infections or worsening nephropathy. Long-term surveillance is recommended, especially in children, to assess growth and kidney function.

Complications

• Progressive kidney scarring (reflux nephropathy)
• Chronic kidney disease or renal insufficiency
• Hypertension (high blood pressure)
• Recurrent or severe urinary tract infections
• Kidney failure (in advanced cases)
• Hydronephrosis (kidney swelling)

Lifestyle & Prevention

• Maintain good hydration to support urinary tract health.
• Practice proper hygiene to reduce infection risk.
• Treat urinary tract infections promptly to prevent recurrence.
• Follow prescribed medication regimens, including antibiotics or antihypertensives.
• Attend regular medical follow-ups for monitoring and management.

When to Seek Professional Help

Seek medical attention if you experience:

• Recurrent urinary tract infections or symptoms (e.g., pain, fever, blood in urine).
• Persistent flank or abdominal pain.
• Signs of kidney dysfunction (e.g., swelling, fatigue, changes in urination).
• New or worsening hypertension.

Tips for Medical Coders

Document the presence of vesicoureteral reflux, reflux nephropathy, and hydroureter, noting whether the condition is unilateral or bilateral (if specified). Include details on imaging findings, surgical interventions, or antibiotic prophylaxis, as these may impact coding accuracy. Ensure documentation supports the unspecified designation when side (unilateral/bilateral) is not clearly stated.