AHA Coding Clinic® for ICD-9 - 2011 Issue 4; VOLUMES 1 & 2 NEW/REVISED CODES

Coronary Atherosclerosis due to Calcified Coronary Lesion

Effective October 1, 2011, code 414.4, Coronary atherosclerosis due to calcified coronary lesion, has been created to distinguish calcified coronary lesions from other ischemic coronary lesions. The deposits of calcium in these lesions present a rigid obstacle that puts patients at increased risk for complications such as inadequate stent expansion, acute stent thrombosis and restenosis when treated by stent and angioplasty. Research has also shown that an increased amount of calcium deposits leads to a higher incidence of major adverse events, in particular the rate of non-Q wave myocardial infarction, when compared to non-calcified lesions. Calcific deposits are...

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