Acute kidney failure with acute cortical necrosis

This code signifies a sudden and severe deterioration of kidney function characterized by the death of tissue in the renal cortex. It represents a specific and grave form of acute kidney injury where the outer layer of the kidney, responsible for filtering blood, undergoes necrosis. This condition often leads to rapid and significant impairment of renal function.

Apply this code when documentation explicitly states "acute cortical necrosis" in the context of acute kidney failure. This diagnosis is typically supported by renal biopsy findings or strong clinical evidence of widespread cortical damage. It is often seen in severe obstetric complications, sepsis, or hemolytic uremic syndrome.

• Ensure documentation clearly distinguishes acute cortical necrosis from other forms of acute tubular necrosis or acute kidney injury.
• Always sequence this code as the primary diagnosis when it is the reason for the encounter, unless another condition is clearly identified as the underlying cause.
• Look for supporting diagnostic imaging (e.g., ultrasound, CT scan) or pathology reports confirming cortical necrosis.