AHA Coding Clinic® for ICD-9 - 2005 Issue 4; VOLUMES 1 AND 2 NEW/REVISED CODES
Peritonitis
Effective October 1, 2005, changes have been made to category 567, formerly Peritonitis, so that it will include retroperitoneal infections. The revised category title is Peritonitis and retroperitoneal infections. Subcategory 567.2, Other suppurative peritonitis, was expanded with the creation of codes 567.21, Peritonitis (acute) generalized, 567.22, Peritoneal abscess, 567.23, Spontaneous bacterial peritonitis, and 567.29, Other suppurative peritonitis. Subcategory 567.3, Retroperitoneal infections, was created with new codes 567.31, Psoas muscle abscess, 567.38, Other retroperitoneal abscess, and 567.39, Other retroperitoneal infections. Subcategory 567.8, Other specified peritonitis, was expanded with the creation...
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Article Overview
This article covers ICD-9-CM updates to the peritonitis section, including revised category structure, newly created subcategories, and added indexed terms related to peritoneal and retroperitoneal infections. It is useful for coders, CDI staff, and compliance teams who need to understand the scope of the update and how the terminology aligns with the tabular classification. The article also includes general discussion of the conditions addressed by the revised codes and highlights the importance of checking both the index and tabular list.
Why This Topic Matters
Accurate classification of peritonitis and related abdominal infections depends on understanding the updated ICD-9-CM structure and terminology. This matters for correct diagnosis coding, case review, and consistency when similar infection terms appear in clinical documentation.
Article Sections
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ICD-9-CM category revisions and new subcategories
Summarizes the October 1, 2005 revision to the peritonitis category and the addition of retroperitoneal infection content. It outlines the affected subcategory structure at a high level.
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Clinical overview of peritonitis and related conditions
Provides a general medical overview of peritonitis, spontaneous bacterial peritonitis, peritoneal abscess, retroperitoneal abscess, and related inflammatory conditions. It also notes common broad etiologies and clinical presentations.
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Revised index and tabular entries
Presents the revised coding index structure for the affected category and its new subcategories. It includes the broad term groupings that were added, deleted, or reorganized in the update.
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Coding examples
Includes short application examples showing how the updated terms are reflected in code selection. The examples are limited to the article’s illustrative cases.
What You Will Learn
- What changed in the peritonitis-related ICD-9-CM category structure
- How retroperitoneal infections were incorporated into the revised classification
- Which general clinical terms were added to the updated index structure
- How the article frames the importance of checking the index and tabular list
- What kinds of clinical scenarios are discussed in the article’s examples
Who Should Read This
- Medical coders
- Coding auditors
- Clinical documentation integrity staff
- Revenue cycle professionals
- Compliance teams
Codes Discussed
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