ICD-10-CM > N00-N99 > N00-N08 > N01 > N01.5 N01.5 Rapidly progressive nephritic syndrome with diffuse mesangiocapillary glomerulonephritis Billable/Specific Copy Code Copy Description Applicable To Rapidly progressive nephritic syndrome with membranoproliferative glomerulonephritis, types 1 and 3, or NOS Type 1 Excludes Rapidly progressive nephritic syndrome with C3 glomerulonephritis (N01.A)Rapidly progressive nephritic syndrome with C3 glomerulopathy (N01.A)