F34.0: Cyclothymia

You are having mood swings due to a mental illness.

You have had the illness for a long time.

With this illness, there are phases when your mood is slightly heightened. You may then feel very energetic and capable. For example, you might be very talkative, restless, or require little sleep.

But there are also phases in which your mood is low and you are unable to enjoy things. You can feel listless or exhausted. Everyday activities can then be more of a burden than before. You may find it harder to concentrate, and be unable to sleep properly.

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).