2026 ICD-10-CM Diagnosis Code K46.0Unspecified abdominal hernia with obstruction, without gangrene

ICD-10-CM Codes›K00–K95›K40-K46›K46

ICD-10-CM K46.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K46.0 is a billable ICD-10-CM diagnosis code for unspecified abdominal hernia with obstruction, without gangrene. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 393 through 395. Coders also document this condition as irreducible hernia of anterior abdominal wall. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Abdominal hernia and Intestinal obstruction and ileus.

Code Identity

ICD-10-CM Code
K46.0
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified abdominal hernia with obstruction, without gangrene
Short Description
Unsp abdominal hernia with obstruction, without gangrene
Parent Code
K46
Unspecified abdominal hernia

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK40-K46Hernia
CategoryK46Unspecified abdominal hernia
This CodeK46.0Unspecified abdominal hernia with obstruction, without gangrene

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Irreducible hernia of anterior abdominal wall
  • Irreducible intra-abdominal hernia
  • Obstructed hernia of abdominal cavity
  • Obstructed hernia of anterior abdominal wall
  • Obstructed internal hernia
  • Obstructed recurrent hernia of anterior abdominal wall
  • Richter's inguinal hernia
  • Strangulated hernia of anterior abdominal wall
  • Strangulated inguinal hernia
  • Strangulated internal hernia

Tabular List NotesGuidance

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

Inclusion Terms

  • Unspecified abdominal hernia causing obstruction
  • Unspecified incarcerated abdominal hernia
  • Unspecified irreducible abdominal hernia
  • Unspecified strangulated abdominal hernia

Index to Diseases and InjuriesGuidance

Alphabetical index entries that point to this code.

External Cause of Injuries IndexGuidance

References for this code in the External Cause of Injuries Index.

    • Hernia, hernial(acquired) (recurrent)
      • abdomen, abdominal
        • with
          • obstruction
    • Incarceration, incarcerated
      • enterocele
    • Incarceration, incarcerated
      • epiplocele
    • Incarceration, incarcerated
      • sarcoepiplocele

Clinical ClassificationClinical

AHRQ’s CCSR groups this code into broader clinical categories.

CCSR DIG010
Abdominal hernia
Default principal diagnosis: inpatient Yes · outpatient Yes
CCSR DIG012
Intestinal obstruction and ileus
Default principal diagnosis: inpatient No · outpatient No

Clinical InformationClinical

  • Abdominal Hernia

    the protrusion of abdominal contents through a congenital or acquired defect in the abdominal wall.

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

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

Convert K46.0 to ICD-9-CMHistory

The closest ICD-9-CM equivalents under the General Equivalence Mappings.

ICD-9-CM
552.9 Hernia, site NOS w obstr
Exact Match The mapping is direct, with no qualifiers.

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 K46.0Overview

Is K46.0 (Unspecified abdominal hernia) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report unspecified abdominal hernia with obstruction, without gangrene on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does K46.0 group to?

When unspecified abdominal hernia with obstruction, without gangrene is the principal diagnosis on an inpatient stay, it groups to MS-DRG 393, 394, 395, with relative weights from 0.6490 to 1.5993 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of K46.0?

Under the General Equivalence Mappings, unspecified abdominal hernia with obstruction, without gangrene converts to ICD-9-CM 552.9 (hernia, site NOS w obstr). The mapping is a direct match.

Footnotes

[1] Not chronic - A diagnosis code that does not fit the criteria for chronic condition (duration, ongoing medical treatment, and limitations) is considered not chronic. Some codes designated as not chronic are acute conditions. Other diagnosis codes that indicate a possible chronic condition, but for which the duration of the illness is not specified in the code description (i.e., we do not know the condition has lasted 12 months or longer) also are considered not chronic.