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

This code represents kidney inflammation and damage (nephritis and nephropathy) that is not specified as acute or chronic, but specifically involves a rapidly progressive form of glomerulonephritis. This condition is characterized by a swift decline in kidney function, often leading to end-stage renal disease if untreated.

Use this code when documentation clearly indicates a diagnosis of glomerulonephritis with rapid progression, but the provider has not specified whether the condition is acute or chronic. Supporting documentation would include biopsy results showing crescent formation, rapid decline in GFR, and clinical signs of kidney failure.

• Do not use this code if the documentation specifies "acute" or "chronic" glomerulonephritis; instead, select a more specific code from categories 580-582.
• Always look for documentation of the underlying cause or associated systemic disease, as this may require additional coding.
• Ensure the "rapidly progressive" aspect is explicitly stated or clearly implied by the clinical course described in the medical record.