K56.1: Intussusception

Part of your intestine has ‘telescoped’ in on itself.

The intestines are made up of the small intestine and the large intestine or colon. Most of the nutrients are absorbed in the small intestine. The large intestine (colon) is where water and salt are withdrawn from the stool. The last segment of the large intestine (colon) is the rectum. Stool then leaves the body through the anus.

The intestines are lined with mucous membrane. The mucous membrane in the intestines is very sensitive and very well supplied with blood. If an intestinal segment turns into towards another intestinal segment, pressure is put on blood vessels. The blood supply of the intestinal segment may then deteriorate, resulting in severe damage to it. If an intestinal segment turns into towards another intestinal segment, the intestines may also become obstructed.

If the intestines are obstructed, you may have a lot of air, feces and fluid in your intestines. As a result, your abdomen is usually larger than normal. Most often, you will then no longer be able to have a bowel movement. In that case, the air can generally no longer escape from the anus. If your stomach is pressed, this may feel uncomfortable. You may have severe abdominal pain or have to vomit.

Additional indicator

On medical documents, the ICD code is often appended by letters that indicate the diagnostic certainty or the affected side of the body.

  • G: Confirmed diagnosis
  • V: Tentative diagnosis
  • Z: Condition after
  • A: Excluded diagnosis
  • L: Left
  • R: Right
  • B: Both sides

Further information


This information is not intended for self-diagnosis and does not replace professional medical advice from a doctor. If you find an ICD code on a personal medical document, please also note the additional indicator used for diagnostic confidence.
Your doctor will assist you with any health-related questions and explain the ICD diagnosis code to you in a direct consultation if necessary.


Provided by the non-profit organization “Was hab’ ich?” gemeinnützige GmbH on behalf of the Federal Ministry of Health (BMG).