ICD-10 Code E79.82 – Hereditary xanthinuria (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code E79.82 – Hereditary xanthinuria
What it is
Hereditary xanthinuria is a rare inherited disorder of purine metabolism that leads to excess xanthine and low uric acid production. It can cause xanthine buildup in urine and sometimes in the kidneys.
Clinical signs
Clinical features vary; refer to documentation. Commonly reported findings include low serum uric acid, increased urinary xanthine, and kidney stones or urinary tract symptoms.
When to use this code
Use this code when the provider documents hereditary xanthinuria, xanthine oxidase deficiency, or a confirmed inherited xanthine metabolism disorder. It may also apply when the condition is the reason for evaluation or follow-up of recurrent stones or abnormal uric acid testing.
Do not use for
Do not use this code for acquired low uric acid states, nonspecific hyperuricosuria, or kidney stones without documented hereditary xanthinuria. Check documentation if the diagnosis is only suspected.
Coding tip
Code only when the inherited disorder is documented or confirmed; do not infer hereditary xanthinuria from isolated lab results.