R82.992 Hyperoxaluria

Name of the Condition

• Hyperoxaluria

Summary

Hyperoxaluria is a medical condition characterized by an excessive urinary excretion of oxalate, which can lead to the formation of kidney stones and kidney damage. It can occur as a primary genetic disorder or secondary to other medical conditions.

Causes

• Primary Hyperoxaluria: A rare genetic condition caused by an enzyme deficiency that leads to the overproduction of oxalate.
• Secondary Hyperoxaluria: Often results from excessive dietary oxalate intake or other diseases affecting oxalate metabolism and excretion.

Risk Factors

• Genetic predisposition for primary hyperoxaluria.
• High intake of oxalate-rich foods like spinach, nuts, and tea.
• Gastrointestinal diseases such as Crohn’s disease or after gastric bypass surgery.

Symptoms

• Recurrent kidney stones.
• Blood in the urine (hematuria).
• Painful urination.
• Frequent urinary tract infections.

Diagnosis

• Urine Tests: Measurement of oxalate levels in a 24-hour urine sample.
• Blood Tests: Serum oxalate levels may be measured.
• Genetic Testing: To confirm primary hyperoxaluria.
• Imaging: Ultrasound or CT scans to detect kidney stones.

Treatment Options

• Dietary Changes: Reduce intake of oxalate-rich foods.
• Hydration: Increase fluid intake to dilute urine.
• Medications: Such as vitamin B6 to reduce oxalate production for some patients.
• Dialysis or Transplant: In severe cases where kidney function is critically affected.

Prognosis and Follow-Up

• Prognosis varies: Primary hyperoxaluria often requires lifelong management, while dietary adjustments can effectively manage secondary hyperoxaluria.
• Regular follow-up is crucial for monitoring renal function and preventing complications like kidney stones.

Complications

• Chronic kidney disease or renal failure if not well-managed.
• Continuous formation of kidney stones can lead to urinary tract obstruction and infections.

Lifestyle & Prevention

• Maintain a diet low in oxalates, sodium, and protein.
• Adequate hydration to reduce urine concentration.
• Regular kidney function monitoring if at risk.

When to Seek Professional Help

• Severe pain in the kidney or bladder area.
• Recurrent urinary tract infections or visible blood in urine.
• Sudden decrease in urine output or higher kidney stone frequency.

Additional Resources

• The Oxalosis & Hyperoxaluria Foundation (OHF) - https://ohf.org/
• National Kidney Foundation - https://www.kidney.org/

Tips for Medical Coders

• Ensure specificity by distinguishing between primary and secondary hyperoxaluria.
• Verify medical records for genetic confirmation in the case of primary hyperoxaluria.
• Avoid confusion with similar renal and urinary tract conditions.