2026 ICD-10-CM Diagnosis Code K38Other diseases of appendix

ICD-10-CM Codes›K00–K95›K35-K38›K38

ICD-10-CM K38
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K38 is a non-billable ICD-10-CM category code for other diseases of appendix, so it cannot be submitted on claims. Use a more specific code from this category instead, such as K38.0, K38.1, K38.2, and K38.3.

Code Identity

ICD-10-CM Code
K38
Billable Status
No — Non-Billable Category
Code Describes
Other diseases of appendix
Chapter
K35-K38
Diseases of appendix

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK35-K38Diseases of appendix
CategoryK38Other diseases of appendix
This CodeK38Other diseases of appendix

Specific Coding for Other diseases of appendixOverview

Non-specific codes like K38 require more characters. Use one of these billable codes instead:

  • Use K38.0 for Hyperplasia of appendix

  • Use K38.1 for Appendicular concretions

  • Use K38.2 for Diverticulum of appendix

  • Use K38.3 for Fistula of appendix

  • Use K38.8 for Other specified diseases of appendix

  • Use K38.9 for Disease of appendix, unspecified

Patient EducationClinical

Colonic Diseases

Your colon, also known as the large intestine, is part of your digestive system. It's a long, hollow tube at the end of your digestive tract where your body makes and stores stool. Many disorders affect the colon's ability to work properly. Some of these include:

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 K38Overview

Is K38 (Other diseases of appendix) a billable code?

No. This is a category header that groups the codes for other diseases of appendix, and headers cannot be submitted on claims. Claims for other diseases of appendix need a more specific code from this category, such as K38.0, K38.1, and K38.2.