E74.1: Disorders of fructose metabolism

You cannot properly process fructose (fruit sugar).

In the body, certain proteins ensure that processes are better or faster. These proteins are also called enzymes. The illness can be caused by a missing enzyme. As a result, you cannot process fructose properly. This illness can be hereditary. That means that other family members can also be affected.

If you cannot properly process fructose, you may not have any symptoms. It is also possible that you cannot tolerate any fructose at all. With the disease, the liver for instance does not work properly or the sugar level in the blood is too low. You may also be seriously ill.

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).