Acute neph syndrome w diffuse mesangial prolif glomrlneph

This code signifies an acute inflammatory process affecting the kidney's filtering units (glomeruli), specifically characterized by the proliferation of mesangial cells in a diffuse pattern. This leads to rapid onset of symptoms such as hematuria, proteinuria, hypertension, and renal impairment. It represents a specific histological subtype of acute nephritic syndrome.

Apply this code when documentation clearly indicates a diagnosis of acute nephritic syndrome with a biopsy-confirmed finding of diffuse mesangial proliferative glomerulonephritis. This is typically used in cases of post-infectious glomerulonephritis or other immune-mediated conditions where this specific histological pattern is identified.

• Ensure the documentation explicitly states "diffuse mesangial proliferative glomerulonephritis" as the underlying cause of the acute nephritic syndrome.
• Do not confuse with other forms of glomerulonephritis (e.g., focal segmental, membranous) without specific documentation of diffuse mesangial proliferation.
• Code any underlying infectious etiology (e.g., streptococcal infection) as an additional diagnosis, following sequencing guidelines.