Originally Posted by cpccoder2008
What about acute on chronic renal insuffiency ?
Kimberlina's right - if it's insufficiency instead of failure, your primary code changes to 593.9, and the secondary stays 585.9. I noticed the difference between acute and chronic ICD-9 designations for failure vs. disease/insufficiency when I was looking this up the first time - I thought it was odd that there would be separate entries for renal failure and renal disease if it was acute, but not if it's chronic. It's like the people that made the code set thought, "Eh, who cares if it's a disease or if it's failing? Chronic Kidney problems are all the same...just stick them all under 585.9"
My guess is it has something to do with the CKD w/stages
codes being there. I'm no nephrology expert, but this has made me curious - are the two really all that different?