Chronic glomerulonephritis with lesion of membranoproliferative glomerulonephritis

This code signifies a persistent inflammation of the kidney's filtering units (glomeruli) specifically characterized by the pathological changes seen in membranoproliferative glomerulonephritis (MPGN). MPGN involves thickening of the glomerular basement membrane and proliferation of mesangial and endothelial cells, leading to impaired kidney function.

Use this code when documentation confirms a diagnosis of chronic glomerulonephritis with a biopsy-proven or clinically established lesion consistent with membranoproliferative glomerulonephritis. This typically applies to patients with long-standing kidney disease, proteinuria, hematuria, and often progressive renal insufficiency.

• Ensure the medical record explicitly states "chronic" and specifies "membranoproliferative" as the lesion type.
• Distinguish from acute or rapidly progressive forms of glomerulonephritis.
• Code any associated chronic kidney disease (CKD) stage separately to fully capture the patient's renal status.