AHA Coding Clinic® for ICD-9 - 1996 Fourth Quarter
Coronary Atherosclerosis of Bypass Graft
New fifth-digits for code 414.0, Coronary atherosclerosis, were created in 1994 (see Coding Clinic, Fourth Quarter 1994, page 49, and Coding Clinic, Second Quarter 1995, page 17) to allow for a distinction between a disease process which occurs to a native coronary artery and to a bypass graft. It was unforeseen that additional scenarios would present themselves, which the existing fifth-digits would not be able to accommodate. 414.0 Coronary atherosclerosis Revised code 414.00 Of unspecified type of vessel, native or graft New code 414.04 Of artery bypass graft Internal mammary artery New code 414.05...
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Article Overview
This article explains coding guidance for coronary atherosclerosis when documentation is incomplete or refers to a bypass graft rather than a native coronary vessel. It is aimed at coding professionals, auditors, and CDI staff who work with cardiovascular diagnoses and need to understand the relevant ICD-9-CM code structure and documentation distinctions discussed by Coding Clinic.
Why This Topic Matters
Accurate classification of coronary atherosclerosis depends on whether the condition involves a native vessel or a bypass graft, and incomplete documentation can lead to different code assignment considerations. This article helps readers understand the scope of the documentation problem and the code-family updates referenced in the discussion.
Article Sections
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Background on fifth-digit expansion
Introduces the ICD-9-CM code family and explains why additional documentation distinctions were needed beyond the earlier fifth-digit structure.
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Revised and new code options
Presents the relevant code-family entries discussed in the article and situates them within the broader coronary atherosclerosis topic.
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Question: documentation without vessel type
Addresses the first documentation scenario involving coronary atherosclerosis where the record does not specify whether the vessel is native or graft-related.
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Question: coronary atherosclerosis of bypass graft
Addresses the second scenario involving documentation that references bypass graft involvement with limited additional detail.
What You Will Learn
- How the article frames documentation distinctions between native coronary vessels and bypass grafts
- Which ICD-9-CM code-family entries are discussed for coronary atherosclerosis
- How Coding Clinic examples in the article address incomplete documentation scenarios
- What types of chart details the article considers relevant to code selection
Who Should Read This
- Medical coders
- Coding auditors
- Clinical documentation integrity specialists
- Revenue cycle professionals
- Cardiology billing staff
Codes Discussed
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