2026 ICD-10-CM Diagnosis Code K58Irritable bowel syndrome

ICD-10-CM Codes›K00–K95›K55-K64›K58

ICD-10-CM K58
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K58 is a non-billable ICD-10-CM category code for irritable bowel syndrome, so it cannot be submitted on claims. Use a more specific code from this category instead, such as K58.0, K58.1, K58.2, and K58.8.

Code Identity

ICD-10-CM Code
K58
Billable Status
No — Non-Billable Category
Code Describes
Irritable bowel syndrome
Chapter
K55-K64
Other diseases of intestines

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK55-K64Other diseases of intestines
CategoryK58Irritable bowel syndrome
This CodeK58Irritable bowel syndrome

Specific Coding for Irritable bowel syndromeOverview

Non-specific codes like K58 require more characters. Use one of these billable codes instead:

  • Use K58.0 for Irritable bowel syndrome with diarrhea

  • Use K58.1 for Irritable bowel syndrome with constipation

  • Use K58.2 for Mixed irritable bowel syndrome

  • Use K58.8 for Other irritable bowel syndrome

  • Use K58.9 for Irritable bowel syndrome, unspecified

Tabular List NotesGuidance

Coding notes and annotation back-references applicable to this code.

Includes

  • irritable colon
  • spastic colon

Clinical InformationClinical

  • Irritable Bowel Syndrome

    a disorder with chronic or recurrent colonic symptoms without a clearcut etiology. this condition is characterized by chronic or recurrent abdominal pain, bloating, mucus in feces, and an erratic disturbance of defecation.

Patient EducationClinical

Irritable Bowel Syndrome

Irritable bowel syndrome (IBS) is a problem that affects the large intestine. It can cause abdominal cramping, bloating, and a change in bowel habits. Some people with the disorder have constipation. Some have diarrhea. Others go back and forth between the two.

Read the full article at MedlinePlus

Courtesy of MedlinePlus, a service of the U.S. National Library of Medicine.

Code HistoryHistory

FY 2016AddedAdded to the ICD-10-CM code setEffective October 1, 2015, the first year of ICD-10-CM.
FY 2017–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About K58Overview

Is K58 (Irritable bowel syndrome) a billable code?

No. This is a category header that groups the codes for irritable bowel syndrome, and headers cannot be submitted on claims. Claims for irritable bowel syndrome need a more specific code from this category, such as K58.0, K58.1, and K58.2.