Irritable Bowel Syndrome

Codes K58.1 , Irritable bowel syndrome with constipation; K58.2 , Mixed irritable bowel syndrome; and K58.8 , Other irritable bowel syndrome, have been created to distinguish types of irritable bowel syndrome. Irritable bowel syndrome (IBS) is characterized by abdominal pain or discomfort, bloating and changes in bowel movement. There are four types of IBS that are based on the predominant alteration in stool consistency: IBS-C, with constipation, IBS-D, with diarrhea, IBS-M, mixed IBS (both constipation and diarrhea) and IBS-U, unsubtyped IBS (diarrhea and constipation less than 25% of the time). IBS is a functional gastrointestinal disorder that affects 10%...

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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 article reviews irritable bowel syndrome from a coding and clinical perspective. It explains how the condition is categorized into major subtypes, discusses general diagnostic evaluation, and summarizes broad treatment approaches. The content is useful for coders, CDI staff, and clinical teams who need a high-level understanding of the topic and its classification in ICD-10-CM.

Why This Topic Matters

Irritable bowel syndrome is common and can be documented in different ways depending on subtype. Understanding the general classification and clinical context helps support accurate diagnosis coding and review of related documentation.

What You Will Learn

  • How irritable bowel syndrome is discussed in relation to coding and subtype classification
  • What general clinical features are associated with the condition
  • What broad diagnostic and treatment topics are mentioned in the article
  • How the condition is framed for use in documentation and coding review

Who Should Read This

  • Medical coders
  • Clinical documentation integrity specialists
  • Billing staff
  • Physicians and advanced practice providers
  • Revenue cycle teams

Codes Discussed


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