Acute kidney failure with other specified pathological lesion in kidney

This code signifies a sudden and severe decline in kidney function, specifically when the underlying cause is an identifiable, distinct pathological lesion within the kidney itself, other than those explicitly classified elsewhere (e.g., acute tubular necrosis, cortical necrosis). This indicates intrinsic kidney damage leading to acute renal impairment.

Apply this code when documentation clearly states acute kidney failure and specifies an intrinsic renal lesion not covered by more specific ICD-9 codes. Examples include acute interstitial nephritis, acute glomerulonephritis, or other specific inflammatory or structural kidney pathologies causing the acute failure. Documentation should detail the acute nature of the renal failure and the specific renal lesion identified through biopsy or other diagnostic means.

• Always code the underlying cause of the acute kidney failure first, if known and not already captured by this code.
• Distinguish from acute tubular necrosis (584.5) or acute cortical necrosis (584.6) which have their own specific codes.
• Ensure the documentation explicitly states "acute" kidney failure and identifies a specific "other specified pathological lesion" to support this code.