AHA Coding Clinic® for ICD-10-CM and ICD-10-PCS - 2021 Issue 3; Ask the Editor
Left Internal Mammary Artery Free Graft between Obtuse Marginal Saphenous Vein Graft and Left Anterior Descending Artery
A patient with coronary artery disease presents for three-vessel aortocoronary artery bypass graft surgery. After sternotomy, reverse saphenous vein aortocoronary anastomoses were completed from the ascending aorta to the right coronary artery (RCA) and to the obtuse marginal (OM) artery. After obtaining a left internal mammary artery (LIMA) free graft, the distal end of the graft was anastomosed to the left anterior descending artery (LAD) and the proximal end was anastomosed to the hood of the completed vein graft anastomosis at the OM. What is the appropriate qualifier value for bypass grafting using the LIMA as a free graft between the LAD and the OM vein graft? ...
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Article Overview
This article reviews a coronary artery bypass grafting scenario and focuses on how to determine the appropriate ICD-10-PCS qualifier for a left internal mammary artery free graft placed between coronary targets and a completed vein graft. It is intended for inpatient facility coders, coding educators, and reimbursement professionals who need to interpret operative anatomy and bypass configuration in ICD-10-PCS. The article centers on a single operative example and the related coding assignment discussion.
Why This Topic Matters
Coronary bypass procedures often involve complex graft configurations that can change how an ICD-10-PCS code is selected. Understanding the operative relationship between arterial and venous grafts helps support accurate inpatient procedure reporting.
What You Will Learn
- How a coronary bypass operative description is interpreted for ICD-10-PCS coding
- How graft configuration affects procedure coding in a multivessel bypass case
- How the article frames the selection of the relevant ICD-10-PCS qualifier in a bypass scenario
- How operative anatomy is translated into an inpatient procedure code assignment context
Who Should Read This
- Inpatient medical coders
- Coding educators
- Clinical documentation specialists
- Hospital reimbursement staff
Codes Discussed
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