Chronic neph syndrome w diffuse mesangial prolif glomrlneph

This code signifies a long-standing kidney disorder characterized by inflammation of the glomeruli, specifically involving the mesangial cells in a widespread pattern. This chronic inflammation impairs the kidney's filtering function, leading to persistent proteinuria, hematuria, and often progressive renal dysfunction.

Apply this code when documentation explicitly states a diagnosis of chronic nephritic syndrome with diffuse mesangial proliferative glomerulonephritis. This diagnosis is typically confirmed through renal biopsy findings and supported by clinical signs of chronic kidney disease, such as persistent microscopic hematuria, proteinuria, and elevated serum creatinine.

• Ensure the documentation specifies "chronic" and "diffuse mesangial proliferative" to differentiate from acute or other forms of glomerulonephritis.
• Do not use this code for acute or rapidly progressive glomerulonephritis; refer to codes within N00-N02.
• Code any associated chronic kidney disease (CKD) stage separately, as this code describes the underlying etiology.