E23.3: Hypothalamic dysfunction, not elsewhere classified

Certain messenger substances (hormones) in your brain are not being formed correctly.

Many messenger substances in the body are controlled by a specific part of the brain. These messenger substances influence growth, metabolism and sex hormones, for example. This part of the brain is called the hypothalamus. Here, regulating messenger substances are formed.

In your case, the regulating messenger substances have changed.

Women may no longer be able to menstruate. Men may have erectile dysfunction.

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).