2026 ICD-10-CM Diagnosis Code K56.0Paralytic ileus

ICD-10-CM Codes›K00–K95›K55-K64›K56

ICD-10-CM K56.0
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K56.0 is a billable ICD-10-CM diagnosis code for paralytic ileus. It is valid on HIPAA claims for fiscal year 2026 (October 1, 2025 through September 30, 2026) and groups to MS-DRG 388 through 390. In AHRQ's Clinical Classifications Software (CCSR), this diagnosis falls under Intestinal obstruction and ileus.

Code Identity

ICD-10-CM Code
K56.0
Billable Status
Yes — Valid for Submission
Code Describes
Paralytic ileus
Short Description
Paralytic ileus
Same as the full description in the CMS dataset.
Parent Code
K56
Paralytic ileus and intestinal obstruction without hernia

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK55-K64Other diseases of intestines
CategoryK56Paralytic ileus and intestinal obstruction without hernia
This CodeK56.0Paralytic ileus

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Functional intestinal obstruction due to decreased peristalsis
  • Motility disorder of small intestine
  • Neural reflex-induced ileus
  • Paralysis of colon
  • Paralytic ileus
  • Paralytic ileus of large intestine
  • Paralytic ileus of small intestine
  • Paralytic ileus of small intestine and colon
  • Paralytic ileus of the newborn

Tabular List NotesGuidance

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

Inclusion Terms

  • Paralysis of bowel
  • Paralysis of colon
  • Paralysis of intestine

Type 1 Excludes

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.

    • Ileus(bowel) (colon) (inhibitory) (intestine)
      • adynamic
    • Ileus(bowel) (colon) (inhibitory) (intestine)
      • neurogenic
    • Ileus(bowel) (colon) (inhibitory) (intestine)
      • paralytic
    • Obstruction, obstructed, obstructive
      • intestine
        • adynamic
    • Obstruction, obstructed, obstructive
      • intestine
        • neurogenic
    • Obstruction, obstructed, obstructive
      • intestine
        • reflex
    • Paralysis, paralytic(complete) (incomplete)
      • bowel, colon or intestine
    • Paralysis, paralytic(complete) (incomplete)
      • colon
    • Paralysis, paralytic(complete) (incomplete)
      • ileus
    • Paralysis, paralytic(complete) (incomplete)
      • intestine
    • Paresis
      • bowel, colon or intestine

Clinical ClassificationClinical

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

CCSR DIG012
Intestinal obstruction and ileus
Default principal diagnosis: inpatient Yes · outpatient Yes

Patient EducationClinical

Intestinal Obstruction

An intestinal obstruction occurs when food or stool cannot move through the intestines. The obstruction can be complete or partial. There are many causes. The most common are adhesions, hernias, cancers, and certain medicines.

Read the full article at MedlinePlus

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

Convert K56.0 to ICD-9-CMHistory

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

ICD-9-CM
560.1 Paralytic ileus
Approximate The match is approximate rather than exact.

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 K56.0Overview

Is K56.0 (Paralytic ileus and intestinal obstruction without hernia) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report paralytic ileus on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does K56.0 group to?

When paralytic ileus is the principal diagnosis on an inpatient stay, it groups to MS-DRG 388, 389, 390, with relative weights from 0.5440 to 1.4768 depending on complications. Higher weights mean higher Medicare reimbursement.

What is the ICD-9 equivalent of K56.0?

Under the General Equivalence Mappings, paralytic ileus converts to ICD-9-CM 560.1 (paralytic ileus). The mapping is approximate, so confirm the match fits the documentation.

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.