Other secondary hyperoxaluria

This code signifies an elevated level of oxalate in the urine (hyperoxaluria) that is not due to a primary genetic defect in oxalate metabolism. Instead, it arises as a consequence of another underlying medical condition or external factor. This secondary form of hyperoxaluria can lead to kidney stone formation and, in severe cases, nephrocalcinosis and renal impairment.

Use this code when documentation indicates hyperoxaluria secondary to conditions such as inflammatory bowel disease, bariatric surgery, chronic pancreatitis, or dietary factors (e.g., excessive oxalate intake). Supporting documentation should clearly identify the secondary nature of the hyperoxaluria and, ideally, the underlying cause.

• Always sequence the underlying condition causing the secondary hyperoxaluria first, if known and documented.
• Differentiate from primary hyperoxaluria (E72.53), which is a genetic disorder.
• Ensure documentation specifies "secondary" hyperoxaluria to avoid confusion with unspecified or primary forms.