ICD-10-CM > N00-N99 > N10-N16 > N13 > N13.7 > N13.73 N13.73 Vesicoureteral-reflux with reflux nephropathy with hydroureter Non-Billable/Non-Specific Codes N13.731Vesicoureteral-reflux with reflux nephropathy with hydroureter, unilateralN13.732Vesicoureteral-reflux with reflux nephropathy with hydroureter, bilateralN13.739Vesicoureteral-reflux with reflux nephropathy with hydroureter, unspecified