Paralytic ileus and intestinal obstruction without hernia
In Other diseases of intestines (K55-K64), chapter 11: Diseases of the Digestive System
16 billable codes under K56: 1 is an MCC, 14 are a CC; all map to HCC 78 (Intestinal Obstruction/Perforation).A CC or MCC (major CC) is a secondary diagnosis that raises the MS-DRG payment. An HCC counts toward a Medicare Advantage patient's risk score.
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Instructional notes
Excludes1: not coded here, use a different code
Excludes2: not included here, code separately if applicable
- stenosis of anus or rectum (K62.4)
Official coding guidelines
From the ICD-10-CM Official Guidelines for Coding and Reporting, FY 2027 (CMS and NCHS). Links open the PDF at the right page.
There are no chapter-specific rules for Chapter 11 yet, so the general rules in Section I.B apply.
All codes under K56
K56 can't be used on a claim. Pick a billable code below; grey headings group them.
- K56.0Paralytic ileus
- K56.1Intussusception
- K56.2Volvulus
- K56.3Gallstone ileus
- K56.4Other impaction of intestine
- K56.41Fecal impaction
- K56.49Other impaction of intestine
- K56.5Intestinal adhesions [bands] with obstruction (postinfection)
- K56.50Intestinal adhesions [bands], unspecified as to partial versus complete obstruction
- K56.51Intestinal adhesions [bands], with partial obstruction
- K56.52Intestinal adhesions [bands] with complete obstruction
- K56.6Other and unspecified intestinal obstruction
- K56.60Unspecified intestinal obstruction
- K56.600Partial intestinal obstruction, unspecified as to cause
- K56.601Complete intestinal obstruction, unspecified as to cause
- K56.609Unspecified intestinal obstruction, unspecified as to partial versus complete obstruction
- K56.69Other intestinal obstruction
- K56.690Other partial intestinal obstruction
- K56.691Other complete intestinal obstruction
- K56.699Other intestinal obstruction unspecified as to partial versus complete obstruction
- K56.7Ileus, unspecified
K56 MS-DRGs
As the principal diagnosis, the billable codes under K56 group to MS-DRG 388, 389, 390, 791, or 793 (v44.0). Which one applies depends on procedures performed, secondary diagnoses (CC/MCC), and the patient's age and discharge status.
- DRG 388 Gastrointestinal Obstruction with MCC (16 of 16 codes)
- DRG 389 Gastrointestinal Obstruction with CC (16 of 16 codes)
- DRG 390 Gastrointestinal Obstruction without CC/MCC (16 of 16 codes)
- DRG 791 Prematurity with Major Problems (12 of 16 codes)
- DRG 793 Full Term Neonate with Major Problems (12 of 16 codes)
Other codes that refer to K56
Notes on these codes point to K56.
About the condition
Plain-language background from MedlinePlus (National Library of Medicine), not coding guidance.
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 more about intestinal obstruction on MedlinePlusCode history
Valid since FY2016, when ICD-10-CM took effect on October 1, 2015. No changes since.