Nephritis and nephropathy, not specified as acute or chronic, with lesion of membranoproliferative glomerulonephritis

This code represents a kidney disorder characterized by inflammation and damage to the glomeruli, specifically identified as membranoproliferative glomerulonephritis. The condition is not specified as either acute or chronic, indicating a general diagnosis of this particular type of kidney disease. It involves changes to the glomerular basement membrane and mesangium, affecting the kidney's filtering function.

This code is appropriate when documentation confirms a diagnosis of membranoproliferative glomerulonephritis without further specification of its acuity (acute or chronic). It should be used when pathology reports or physician notes clearly identify this specific glomerular lesion as the cause of the patient's nephropathy. This code is suitable for initial diagnoses or ongoing management where the chronicity is not yet determined or explicitly stated.

• Ensure the documentation explicitly states "membranoproliferative glomerulonephritis" and does not specify acute or chronic.
• If the documentation specifies acute or chronic, a more specific code within the 580-583 range should be selected.
• Always review pathology reports for definitive identification of the glomerular lesion type.