ICD-10-CM > N00-N99 > N00-N08 > N06 > N06.2 N06.2 Isolated proteinuria with diffuse membranous glomerulonephritis Non-Billable/Non-Specific Codes N06.20Isolated proteinuria with diffuse membranous glomerulonephritis, unspecifiedN06.21Primary membranous nephropathy with isolated proteinuriaN06.22Secondary membranous nephropathy with isolated proteinuriaN06.29Other isolated proteinuria with diffuse membranous glomerulonephritis