Isolated proteinuria w diffuse mesangiocapillary glomrlneph

This code signifies the presence of persistent proteinuria without other significant renal abnormalities, specifically when the underlying kidney pathology is identified as diffuse mesangiocapillary glomerulonephritis. This condition involves immune complex deposition within the glomeruli, leading to inflammation and impaired filtration.

Apply this code when documentation confirms isolated proteinuria and a renal biopsy or other diagnostic studies definitively identify diffuse mesangiocapillary glomerulonephritis as the cause. This typically occurs after ruling out other causes of proteinuria and systemic diseases.

• Ensure documentation explicitly states "diffuse mesangiocapillary glomerulonephritis" as the cause of isolated proteinuria.
• Do not use if the underlying glomerulonephritis is specified as C3 glomerulonephritis or C3 glomerulopathy, as these have a separate, more specific code.
• Consider sequencing with codes for any associated systemic conditions if applicable, but remember this code describes the renal manifestation.