G93.3: Postviral fatigue syndrome

You have a disorder as a result of which you have been extremely fatigued for a long time.

The precise cause of this disease is unknown. This can occur after contact with pathogens such as viruses, for example.

As well as extreme fatigue, the disorder may be accompanied by other symptoms. These include, for example, sleep disorders, concentration disorders and pain. Even slight exertions can cause the condition to get very much worse. The disorder affects your everyday life.

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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