Occlusion of Coronary Bypass Grafts

Note: As of October 1, 1994, coronary artery bypass graft occlusions due to atherosclerosis are coded to 414.02 or 414.03. The code assignments for occlusion of coronary artery bypass graft (CABG) are as follows: Occlusion of coronary bypass graft (live graft) (synthetic graft) 996.03 due to failure of live graft to maintain patency (graft closure during first year) (early graft failure) 996.03 fibrointimal proliferation 996.03 hyperplasia, internal, of live graft (late graft closure) 996.03 progression of atherosclerotic disease proximal to (or distal to) graft site 996.03 [414.0] thrombosis of live or...

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Note:  The following article synopsis was NOT provided by the AHA. It was created by Find-A-Code/innoviHealth.

Article Overview

This premium article reviews how occlusion of coronary bypass grafts is addressed in medical coding and summarizes the clinical mechanisms that can underlie graft failure. It is intended for coders and coding professionals who need to understand the scope of graft-occlusion guidance, the related diagnosis categories, and the background medical concepts that support accurate record interpretation.

Why This Topic Matters

Coronary bypass graft occlusion can be documented under different clinical causes, and the coding approach depends on how the record characterizes the event. Understanding the article helps coders and auditors interpret bypass graft failure documentation consistently and distinguish among related diagnosis concepts.

What You Will Learn

  • How coronary bypass graft occlusion is framed for coding purposes
  • The broad clinical causes associated with bypass graft failure
  • Background context on graft patency and post-surgical occlusion patterns
  • Why documentation may not always identify the exact cause of graft occlusion

Who Should Read This

  • Medical coders
  • Coding auditors
  • Revenue cycle professionals
  • Clinical documentation specialists

Codes Discussed

  • ICD-9-CM: 414.02
  • ICD-9-CM: 414.03
  • ICD-9-CM: 996.03
  • ICD-9-CM: 996.7
  • ICD-9-CM: 414.0

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