ICD-10-CM > N00-N99 > N00-N08 > N06 > N06.5 N06.5 Isolated proteinuria with diffuse mesangiocapillary glomerulonephritis Billable/Specific Copy Code Copy Description Applicable To Isolated proteinuria with membranoproliferative glomerulonephritis, types 1 and 3, or NOS Type 1 Excludes Isolated proteinuria with C3 glomerulonephritis (N06.A)Isolated proteinuria with C3 glomerulopathy (N06.A)