Rapidly progr neph syndrome w diffuse mesangiocap glomrlneph

This code signifies a severe and rapidly worsening form of kidney inflammation characterized by widespread damage to the mesangial and capillary structures within the glomeruli. It represents a specific type of rapidly progressive glomerulonephritis (RPGN) where the kidney's filtering units are quickly deteriorating, leading to acute renal failure.

Apply this code when documentation clearly indicates a diagnosis of rapidly progressive nephritic syndrome and specifies diffuse mesangiocapillary glomerulonephritis as the underlying pathology. This diagnosis is typically supported by renal biopsy findings and a rapid decline in kidney function.

• Ensure the documentation explicitly states "diffuse mesangiocapillary" to differentiate from other forms of glomerulonephritis.
• Review the "Excludes1" notes carefully to avoid co-coding with N01.A, which specifies C3 glomerulonephritis or glomerulopathy.
• Confirm the "rapidly progressive" nature of the nephritic syndrome is documented, indicating a swift decline in renal function.