Coding Tip: Coronary Artery

This was a big change for coders as these cases were coded to the number of coronary arteries treated in ICD-9-CM. The descriptor “sites” was removed for FY2017. The new guideline applies to the number of coronary arteries treated and not the number of sites treated. This is going back to the way coronary artery procedures were coded in ICD-9-CM.

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