2026 ICD-10-CM Diagnosis Code K56.609Unspecified intestinal obstruction, unspecified as to partial versus complete obstruction

ICD-10-CM Codes›K00–K95›K55-K64›K56

ICD-10-CM K56.609
CMSSource: CMS FY 2026 ICD-10-CM dataset · Effective Oct 1, 2025 – Sep 30, 2026

K56.609 is a billable ICD-10-CM diagnosis code for unspecified intestinal obstruction, unspecified as to partial versus complete obstruction. 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
K56.609
Billable Status
Yes — Valid for Submission
Code Describes
Unspecified intestinal obstruction, unspecified as to partial versus complete obstruction
Short Description
Unsp intestnl obst, unsp as to partial versus complete obst
Parent Code
K56.60
Unspecified intestinal obstruction

Code Classification

ChapterK00–K95Diseases of the digestive system
SectionK55-K64Other diseases of intestines
CategoryK56Paralytic ileus and intestinal obstruction without hernia
This CodeK56.609Unspecified intestinal obstruction, unspecified as to partial versus complete obstruction

Approximate SynonymsGuidance

Alternate terms and clinical phrases that map to this code.

  • Acute gastric ulcer with hemorrhage
  • Acute gastric ulcer with hemorrhage and obstruction
  • Acute gastric ulcer with hemorrhage and perforation
  • Acute gastric ulcer with hemorrhage, with perforation and with obstruction
  • Acute gastric ulcer with obstruction
  • Acute gastric ulcer with perforation AND obstruction
  • Acute gastric ulcer without hemorrhage AND without perforation
  • Acute gastric ulcer without hemorrhage AND without perforation but with obstruction
  • Acute gastrojejunal ulcer with hemorrhage
  • Acute gastrojejunal ulcer with hemorrhage and obstruction
  • Acute gastrojejunal ulcer with hemorrhage and perforation
  • Acute gastrojejunal ulcer with hemorrhage, with perforation and with obstruction
  • Acute gastrojejunal ulcer with obstruction
  • Acute gastrojejunal ulcer with perforation
  • Acute gastrojejunal ulcer with perforation AND obstruction
  • Acute gastrojejunal ulcer without hemorrhage AND without perforation
  • Acute gastrojejunal ulcer without hemorrhage AND without perforation but with obstruction
  • Acute intestinal obstruction
  • Acute peptic ulcer with hemorrhage AND obstruction
  • Acute peptic ulcer with hemorrhage, with perforation AND with obstruction
  • Acute peptic ulcer with perforation AND obstruction
  • Acute peptic ulcer without hemorrhage AND without perforation
  • Acute peptic ulcer without hemorrhage AND without perforation but with obstruction
  • Chronic gastric ulcer with hemorrhage
  • Chronic gastric ulcer with hemorrhage and with obstruction
  • Chronic gastric ulcer with hemorrhage and with perforation
  • Chronic gastric ulcer with hemorrhage, with perforation and with obstruction
  • Chronic gastric ulcer with obstruction
  • Chronic gastric ulcer with perforation AND with obstruction
  • Chronic gastrojejunal ulcer with hemorrhage
  • Chronic gastrojejunal ulcer with hemorrhage and obstruction
  • Chronic gastrojejunal ulcer with hemorrhage and perforation
  • Chronic gastrojejunal ulcer with hemorrhage, with perforation and with obstruction
  • Chronic gastrojejunal ulcer with obstruction
  • Chronic gastrojejunal ulcer with perforation
  • Chronic gastrojejunal ulcer with perforation AND with obstruction
  • Chronic peptic ulcer with hemorrhage AND obstruction
  • Chronic peptic ulcer with hemorrhage AND perforation
  • Chronic peptic ulcer with hemorrhage, with perforation AND with obstruction
  • Chronic peptic ulcer with perforation AND obstruction
  • Crohn's disease of small intestine with stenosis
  • Diaphragmatic hernia with gangrene
  • Extrinsic intestinal obstruction
  • Gastric anastomotic hemorrhage
  • Gastric necrosis
  • Gastric ulcer with hemorrhage and obstruction
  • Gastric ulcer with hemorrhage, with perforation and with obstruction
  • Gastric ulcer with perforation AND obstruction
  • Gastric ulcer without hemorrhage AND without perforation but with obstruction
  • Gastrointestinal obstruction
  • Gastrojejunal ulcer with hemorrhage AND obstruction
  • Gastrojejunal ulcer with hemorrhage AND perforation
  • Gastrojejunal ulcer with hemorrhage, with perforation and with obstruction
  • Gastrojejunal ulcer with perforation AND obstruction
  • Gastrojejunal ulcer without hemorrhage AND without perforation
  • Gastrojejunal ulcer without hemorrhage AND without perforation but with obstruction
  • Hiatal hernia with gangrene AND obstruction
  • Hiatus hernia with gangrene
  • Hiatus hernia with obstruction
  • Intestinal obstruction
  • Large bowel obstruction
  • Obstructed diaphragmatic hernia
  • Obstructed diaphragmatic hernia with gangrene
  • Obstruction of colon
  • Peptic ulcer with hemorrhage AND obstruction
  • Peptic ulcer with obstruction
  • Peptic ulcer without hemorrhage AND without perforation but with obstruction
  • Small bowel obstruction
  • Stenosis of intestine
  • Stricture of intestine
  • Stricture of small intestine

Tabular List NotesGuidance

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

Inclusion Terms

  • Intestinal obstruction NOS

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.

    • Obstruction, obstructed, obstructive
      • 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

Clinical InformationClinical

  • Intestinal Obstruction

    any impairment, arrest, or reversal of the normal flow of intestinal contents toward the anal canal.

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 K56.609 to ICD-9-CMHistory

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

ICD-9-CM
560.9 Intestinal obstruct NOS
Approximate The match is approximate rather than exact.

Code History & ChangesHistory

Replacement K56.609 replaces the following previously assigned code(s):

  • K56.60 - Unspecified intestinal obstruction
FY 2018AddedAdded to the ICD-10-CM code setEffective October 1, 2017.
FY 2019–2025No changes
FY 2026CurrentCurrent code set, no changesEffective October 1, 2025 through September 30, 2026.

Questions About K56.609Overview

Is K56.609 (Unspecified intestinal obstruction) a billable code?

Yes. This is a billable ICD-10-CM code, specific enough to report unspecified intestinal obstruction, unspecified as to partial versus complete obstruction on HIPAA-covered claims from October 1, 2025 through September 30, 2026.

What MS-DRG does K56.609 group to?

When unspecified intestinal obstruction, unspecified as to partial versus complete obstruction 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 K56.609?

Under the General Equivalence Mappings, unspecified intestinal obstruction, unspecified as to partial versus complete obstruction converts to ICD-9-CM 560.9 (intestinal obstruct NOS). 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.