AHA Coding Clinic® for ICD-9 - 2007 Issue 4; VOLUMES 1 AND 2 NEW/REVISED CODES
Chronic Total Occlusion of Coronary Artery
Effective October 1, 2007, code 414.2, Chronic total occlusion of coronary artery, has been created to capture this diagnosis. A chronic total occlusion involves complete blockage of a coronary artery that has been present for an extended period of time (e.g., months or years). The chronic total occlusion develops when plaque accumulates in the artery, leading to a substantial reduction in blood flow and the development of bypass collateral blood flow. Although well-developed collaterals do not completely compensate for diminished blood flow, collaterals help to preserve the viability of the myocardium and prevent resting ischemia. Patients with...
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Article Overview
This article discusses a newly created ICD diagnosis code for chronic total occlusion of a coronary artery and places it in the context of coronary disease coding. It is relevant to coders, compliance staff, and cardiovascular documentation teams who need to understand the scope of the diagnosis, its effective date, and the surrounding classification guidance.
Why This Topic Matters
Accurate identification of chronic total coronary occlusion affects diagnosis coding for cardiovascular encounters and helps distinguish it from other coronary occlusion categories. The article also highlights how the diagnosis relates to broader coronary atherosclerosis classification and excludes certain acute conditions.
What You Will Learn
- How this coronary diagnosis is defined at a broad clinical level
- When the diagnosis became effective in the coding system
- How the article situates the diagnosis within broader coronary disease classification
- What related exclusionary categories are noted in the source material
Who Should Read This
- Medical coders
- Coding auditors
- Compliance professionals
- Cardiology documentation staff
- Revenue cycle teams
Codes Discussed
Code Ranges Discussed
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