AHA Coding Clinic® for ICD-9 - 2004 Issue 4; VOLUMES 1 AND 2 NEW/REVISED DIAGNOSIS CODES
Obstructive Chronic Bronchitis with Acute Bronchitis
Effective October 1, 2004, a new code has been created to report acute bronchitis when accompanied by chronic obstructive pulmonary disease (COPD). Modifications made last year to the inclusion terms at code 491.21, Obstructive chronic bronchitis with (acute) exacerbation, led to confusion and other unintended consequences. To resolve these problems, a combination code has been created to report acute bronchitis with COPD. 466 Acute bronchitis and bronchiolitis 466.0 Acute bronchitis Add Excludes: acute bronchitis with chronic obstructive pulmonary disease (491.22) 491 Chronic bronchitis 491.2 Obstructive chronic bronchitis 491.21 With (acute) exacerbation Delete Acute and...
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Article Overview
This article covers an ICD-9-CM respiratory diagnosis update effective October 1, 2004, focusing on how acute bronchitis with COPD was added and how related bronchitis, emphysema, asthma, and chronic airway obstruction categories were revised. It is relevant to coders and compliance staff who need to understand the scope of the classification change and the related index/cross-reference adjustments.
Why This Topic Matters
The update affects how respiratory conditions are categorized in the diagnosis system and helps readers recognize that the change was made to reduce confusion from earlier inclusion-term revisions. It is useful for anyone reviewing historical diagnosis coding guidance for bronchitis and COPD-related reporting.
Article Sections
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ICD-9-CM respiratory diagnosis update
Introduces the effective date and the reason a new combination diagnosis category was added. Summarizes the respiratory classification areas touched by the revision.
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Revisions across related diagnosis categories
Lists the associated updates in bronchitis, emphysema, asthma, and chronic airway obstruction categories. Presents the broader cross-reference and exclusion changes tied to the update.
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Principal diagnosis question
Presents a brief scenario involving COPD and acute bronchitis. Addresses the coding question raised by the scenario in general terms.
What You Will Learn
- The scope of an ICD-9-CM respiratory diagnosis update
- Which related respiratory categories were revised alongside the new combination code
- How the article frames a principal diagnosis scenario involving COPD and acute bronchitis
- Why the update was made to address confusion from prior classification changes
Who Should Read This
- Medical coders
- Coding educators
- Compliance staff
- Revenue cycle professionals
- Clinical documentation staff
Codes Discussed
Code Ranges Discussed
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