ICD-10-CM > E00-E89 > E70-E88 > E72 > E72.5 > E72.54 E72.54 Secondary hyperoxaluria Non-Billable/Non-Specific Type 1 Excludes primary hyperoxaluria (E72.53-) Codes E72.540Dietary hyperoxaluriaE72.541Enteric hyperoxaluriaE72.548Other secondary hyperoxaluriaE72.549Secondary hyperoxaluria, unspecified