2026 ICD-10-CM Diagnosis Code K42Umbilical hernia

ICD-10-CM Codes›K00–K95›K40-K46›K42

ICD-10-CM K42
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K42 is a non-billable ICD-10-CM category code for umbilical hernia, so it cannot be submitted on claims. Use a more specific code from this category instead, such as K42.0, K42.1, and K42.9.

Code Identity

ICD-10-CM Code
K42
Billable Status
No — Non-Billable Category
Code Describes
Umbilical hernia
Chapter
K40-K46
Hernia

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK40-K46Hernia
CategoryK42Umbilical hernia
This CodeK42Umbilical hernia

Specific Coding for Umbilical herniaOverview

Non-specific codes like K42 require more characters. Use one of these billable codes instead:

  • Use K42.0 for Umbilical hernia with obstruction, without gangrene

  • Use K42.1 for Umbilical hernia with gangrene

  • Use K42.9 for Umbilical hernia without obstruction or gangrene

Tabular List NotesGuidance

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

Includes

  • paraumbilical hernia

Type 1 Excludes

Clinical InformationClinical

  • Gangrenous Umbilical Hernia

    a protrusion of necrotic tissue through the abdominal wall under the skin near the umbilicus.

  • Umbilical Hernia

    protrusion of the abdominal cavity contents through the abdominal wall at the umbilicus.

  • Umbilical Hernia with Obstruction without Mention of Gangrene

    the protrusion of contents of the abdominal cavity through the abdominal wall, at the site of the umbilicus, which results in obstruction, without mention of necrosis of the herniated contents.

  • Umbilical Hernia without Mention of Obstruction or Gangrene

    the protrusion of contents of the abdominal cavity through the abdominal wall, at the site of the umbilicus, without mention of obstruction or necrosis of the herniated contents.

Patient EducationClinical

Hernia

A hernia happens when part of an internal organ or tissue bulges through a weak area of muscle. Most hernias are in the abdomen.

Read the full article at MedlinePlus

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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 K42Overview

Is K42 (Umbilical hernia) a billable code?

No. This is a category header that groups the codes for umbilical hernia, and headers cannot be submitted on claims. Claims for umbilical hernia need a more specific code from this category, such as K42.0, K42.1, and K42.9.