K56.3: Gallstone ileus

You have an intestinal obstruction due to a gallstone.

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 The large intestine (colon) is where water and salt are withdrawn from the stool.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.

If the intestinal muscles are no longer able to properly convey the intestinal contents through the intestines, these contents may be jammed and clog the intestines. This is also called an intestinal obstruction or ileus.

The gallbladder can be irritated by gallstones and become inflamed. In your case, a large gallstone has formed in the gallbladder. The gallbladder is in the top right part of the abdomen below the liver. The liver produces bile. The bile flows through bile ducts to the gallbladder and is stored there. When needed, the bile flows through another bile duct to the intestine. There, the bile helps to digest fats.

If the gallbladder has been inflamed for a considerable time, the surrounding tissue can be severely damaged. As a result, an additional connecting passage between the gallbladder and intestines may develop. In your case, a gallstone has gotten into the intestines via such a connecting passage and has caused an obstruction in your intestines.

If you have an intestinal obstruction, you may vomit. It is also possible that you will have pain in your abdomen. Your abdomen may be thicker than normal, because you have a lot of air, feces and fluid in your intestines. If you have an intestinal obstruction, you may be very sick.

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.


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