AHA Coding Clinic® for ICD-9 - 2004 Issue 4; VOLUMES 1 AND 2 NEW/REVISED DIAGNOSIS CODES
Venous Embolism and Thrombosis of Lower Extremity
Effective October 1, 2004, new codes have been created to identify venous embolism and thrombosis of the lower extremity. Prior to this change, these conditions were reported with code 453.8, Other venous embolism and thrombosis of other specified veins. Venous thromboembolism (VTE) refers to occlusion within the venous system. It includes deep vein thrombosis (DVT), typically of the lower extremities, and embolism to the pulmonary vasculature. DVT can cause pain in the leg, and can lead to complications if the thrombus breaks off and travels through the bloodstream to the lung. DVT is more likely to occur in...
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Article Overview
This article covers an ICD coding update effective October 1, 2004, for venous embolism and thrombosis of the lower extremity. It is aimed at coders, auditors, and clinical documentation professionals who need to understand how the revised lower-extremity thrombosis categories are organized and what general guidance was issued alongside the change. The article also references Coding Clinic context and the transition away from an older code used before the update.
Why This Topic Matters
Lower-extremity thrombosis coding can affect diagnosis specificity, documentation interpretation, and consistency during the period when classification changes take effect. Understanding the update helps users recognize the structure of the revised categories and the related publication context.
Article Sections
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Overview of the coding update
Introduces the update affecting venous embolism and thrombosis of the lower extremity and places it in the context of the prior classification.
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Clinical background on venous thromboembolism and deep vein thrombosis
Summarizes the general medical context for venous thromboembolism and deep vein thrombosis, including broad risk-factor information and lower-extremity involvement.
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Revised lower-extremity thrombosis categories
Outlines the new lower-extremity subcategory structure and the associated location groupings introduced in the update.
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Coding clinic examples and guidance context
Presents the article’s example-based guidance and notes its relationship to earlier Coding Clinic advice.
What You Will Learn
- What change in classification was introduced for lower-extremity venous embolism and thrombosis
- How the article organizes lower-extremity thrombosis into location-based groupings
- What general clinical background is provided for venous thromboembolism and deep vein thrombosis
- How the article frames its guidance in relation to Coding Clinic updates
Who Should Read This
- Medical coders
- Coding auditors
- Clinical documentation specialists
- Revenue cycle professionals
Codes Discussed
Code Ranges Discussed
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