Chronic glomerulonephritis with lesion of membranous glomerulonephritis

This code signifies a long-standing inflammation of the kidney's filtering units (glomeruli) specifically characterized by the pathological finding of membranous glomerulonephritis. This condition involves thickening of the glomerular basement membrane due to immune complex deposition, often leading to nephrotic syndrome.

Apply this code when documentation confirms a diagnosis of chronic glomerulonephritis with a biopsy-proven or clinically established lesion of membranous glomerulonephritis. This is typically used for patients presenting with persistent proteinuria, edema, and impaired renal function attributed to this specific histological pattern.

• Ensure the chronicity of the glomerulonephritis is clearly documented.
• Look for specific mention of "membranous glomerulonephritis" from pathology reports or physician notes.
• Do not use for acute presentations or other specific histological types of glomerulonephritis.