Nep syn with sec imm cmplx membr prolif glomrlneph (IC-MPGN)

This code identifies nephrotic syndrome that is specifically caused by secondary immune complex membranoproliferative glomerulonephritis (IC-MPGN). It indicates a severe kidney disorder characterized by proteinuria, hypoalbuminemia, edema, and hyperlipidemia, where the underlying glomerular damage is due to immune complex deposition and proliferation of mesangial and endothelial cells, arising from another systemic condition.

Use this code when documentation clearly states a diagnosis of nephrotic syndrome and specifies that the etiology is secondary immune complex membranoproliferative glomerulonephritis. This typically requires a kidney biopsy report confirming IC-MPGN and clinical evidence of nephrotic syndrome. It is appropriate when the IC-MPGN is a consequence of another identifiable systemic disease.

• Ensure documentation specifies "secondary" IC-MPGN; primary forms of MPGN have different codes.
• Always code the underlying systemic disease causing the secondary IC-MPGN first, if known and applicable.
• Distinguish from other forms of nephrotic syndrome with different underlying glomerular pathologies.