Nephritis and nephropathy, not specified as acute or chronic, with lesion of renal cortical necrosis

This code signifies kidney inflammation or disease that is not specified as acute or chronic, specifically characterized by the death of tissue in the outer layer (cortex) of the kidney. This condition often results in severe kidney dysfunction due to widespread damage to the nephrons.

Use this code when documentation clearly indicates renal cortical necrosis without specifying the chronicity of the underlying nephritis or nephropathy. This typically occurs in cases of severe shock, sepsis, or obstetric complications leading to widespread renal ischemia. Supporting documentation should include pathology reports or imaging findings confirming cortical necrosis.

• Ensure the documentation explicitly states "renal cortical necrosis" and does not specify acute or chronic nephritis/nephropathy.
• Do not use this code if the nephritis or nephropathy is clearly documented as acute (e.g., 580.x) or chronic (e.g., 582.x).
• Sequence this code as a primary diagnosis when the renal cortical necrosis is the main reason for the encounter, or as a secondary diagnosis when it is a significant co-morbidity.