ICD-10-CM > N00-N99 > N00-N08 > N00 > N00.B N00.B Acute nephritic syndrome with immune complex membranoproliferative glomerulonephritis Non-Billable/Non-Specific Codes N00.B1Acute nephritic syndrome with idiopathic immune membranoproliferative glomerulonephritis (IC-MPGN)N00.B2Acute nephritic syndrome with secondary immune complex membranoproliferative glomerulonephritis (IC-MPGN)