Acute kidney failure, unspecified

This code signifies a sudden and severe decline in kidney function, leading to the accumulation of waste products in the blood. It indicates that the specific cause or type of acute renal failure has not been identified or documented. This condition can range from mild impairment to complete kidney shutdown.

Use this code when the medical record clearly documents acute kidney failure, but the physician has not specified the underlying etiology (e.g., prerenal, intrinsic, postrenal). It is appropriate for initial encounters where the cause is still under investigation or when the documentation explicitly states "unspecified acute renal failure."

• Avoid using this code if a more specific type of acute kidney failure (e.g., acute tubular necrosis, acute cortical necrosis) is documented.
• Always query the provider for a more specific diagnosis if possible, as this code offers limited clinical detail.
• Sequence this code as a principal diagnosis when it is the primary reason for the admission or encounter.