New ICD-9 codes for billing the flu among 159 changes effective Oct. 1

Why This Topic Matters

Annual ICD-9-CM updates can affect diagnosis reporting, billing accuracy, and claims processing. The article helps readers understand which code categories were newly added, revised, or invalidated for the update cycle and flags a flu-season-focused subset of changes.

Article Sections

1. Overview of finalized ICD-9-CM changes

   Introduces the scope of the annual update and notes that the changes are effective on October 1. It also places the article in the context of finalized and newly added items for the update cycle.

2. Influenza-related respiratory codes

   Covers the respiratory diagnosis additions associated with influenza and the related removals discussed by the committee. This section focuses on the flu-season-related portion of the update.

3. Finalized ICD-9 changes for 2010-2011

   Provides a chapter-level summary of the finalized ICD-9-CM update counts across major diagnosis groups. It shows the broad distribution of new, revised, and invalid codes by chapter.