2026 ICD-10-CM Diagnosis Code K56.1Intussusception
ICD-10-CM Codes›K00–K95›K55-K64›K56
- Billable — Valid for Submission
- Not Chronic
K56.1 is a billable ICD-10-CM diagnosis code for intussusception. 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
Code Classification
Approximate SynonymsGuidance
Alternate terms and clinical phrases that map to this code.
- Cecocolic intussusception
- Chronic intussusception
- Complete rectal prolapse
- Compound intussusception
- Gastroduodenal disorder
- Gastroduodenal intussusception
- Gastroesophageal intussusception
- Ileocecal intussusception
- Ileocolic intussusception
- Internal complete rectal prolapse with intussusception of rectosigmoid
- Internal intussusception of rectum
- Intussusception of cecum
- Intussusception of colon
- Intussusception of ileum
- Intussusception of intestine
- Intussusception of large intestine
- Intussusception of rectum
- Intussusception of small intestine
- Jejunogastric intussusception
- Multiple intussusception
- Rectal prolapse
- Retrograde intussusception
- Secondary intussusception
- Sigmoidorectal intussusception
Tabular List NotesGuidance
Coding notes and annotation back-references applicable to this code.
Inclusion Terms
- Intussusception or invagination of bowel
- Intussusception or invagination of colon
- Intussusception or invagination of intestine
- Intussusception or invagination of rectum
Type 2 Excludes
- intussusception of appendix K38.8
These terms are the conditions for which that code is to be used. The terms may be synonyms of the code title, or, in the case of "other specified" codes, the terms are a list of the various conditions assigned to that code. The inclusion terms are not necessarily exhaustive. Additional terms found only in the Alphabetic Index may also be assigned to a code.
A type 2 excludes note represents "Not included here". An excludes2 note indicates that the condition excluded is not part of the condition represented by the code, but a patient may have both conditions at the same time. When an Excludes2 note appears under a code, it is acceptable to use both the code and the excluded code together, when appropriate.
Index to Diseases and InjuriesGuidance
Alphabetical index entries that point to this code.
- Telescoped bowel or intestine - K56.1
External Cause of Injuries IndexGuidance
References for this code in the External Cause of Injuries Index.
- Intussusception(bowel) (colon) (enteric) (ileocecal) (ileocolic) (intestine) ( rectum)
- Invagination(bowel, colon, intestine or rectum)
- Telescoped bowel or intestine
Clinical ClassificationClinical
AHRQ’s CCSR groups this code into broader clinical categories.
Clinical InformationClinical
Intussusception
a form of intestinal obstruction caused by the prolapse of a part of the intestine into the adjoining intestinal lumen. there are four types: colic, involving segments of the large intestine; enteric, involving only the small intestine; ileocecal, in which the ileocecal valve prolapses into the cecum, drawing the ileum along with it; and ileocolic, in which the ileum prolapses through the ileocecal valve into the colon.Rectal Prolapse
protrusion of the rectal mucous membrane through the anus. there are various degrees: incomplete with no displacement of the anal sphincter muscle; complete with displacement of the anal sphincter muscle; complete with no displacement of the anal sphincter muscle but with herniation of the bowel; and internal complete with rectosigmoid or upper rectum intussusception into the lower rectum.Rectal Prolapse
protrusion of the rectum through the anus.
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 K56.1 to ICD-9-CMHistory
The closest ICD-9-CM equivalents under the General Equivalence Mappings.
Code HistoryHistory
Questions About K56.1Overview
Is K56.1 (Paralytic ileus and intestinal obstruction without hernia) a billable code?
Yes. This is a billable ICD-10-CM code, specific enough to report intussusception on HIPAA-covered claims from October 1, 2025 through September 30, 2026.
What MS-DRG does K56.1 group to?
When intussusception 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 K56.1?
Under the General Equivalence Mappings, intussusception converts to ICD-9-CM 560.0 (intussusception). 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.
