Contrast-induced nephropathy

This code signifies acute kidney injury that develops as a direct consequence of exposure to iodinated contrast media, typically used in imaging procedures. It is characterized by a sudden decline in renal function, often measured by an increase in serum creatinine, following contrast administration.

Assign this code when documentation explicitly states "contrast-induced nephropathy" or "CIN" and links the acute kidney injury directly to the administration of contrast material. This diagnosis is supported by a temporal relationship between contrast exposure and the onset of renal dysfunction, often within 24-72 hours.

• Do not use this code for pre-existing chronic kidney disease exacerbated by contrast; focus on new acute injury.
• Ensure the documentation clearly distinguishes contrast-induced nephropathy from other causes of acute kidney failure.
• Sequence this code as a secondary diagnosis when the primary reason for the encounter is the condition for which the contrast study was performed.