K51.0: Ulcerative (chronic) pancolitis

You have a disease in which the large intestine is repeatedly becoming inflamed. In your case, the inflammation is affecting the entire large intestine.

The large intestine (colon) is like an upside down U in the abdomen. The first part lies in the lower right corner of the abdomen. Then it continues upwards and runs across from right to left. Then it descends again. There then follows an S-shaped part located on the bottom left side of the abdomen, which then merges into the rectum. The rectum is the last section of the large intestine (colon).

You have ulcerative colitis. With this disease, the large intestine becomes repeatedly inflamed. The precise cause of this disorder is unknown.

The large intestine can be inflamed to a greater or lesser degree of severity. The large intestine may be permanently inflamed or suffer bouts of inflammation. As a result, the symptoms may have a greater or lesser degree of severity. It may also be that the large intestine has not been inflamed for a considerable time.

The disorder may cause a variety of symptoms. You may have bloody diarrhea, weight loss or abdominal pain, for example. It is also possible that you will have bleeding from your intestines.

With the disease, other areas of the body outside of the large intestine may also be affected. For example, the joints or skin may also become inflamed.

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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