F74.8: Dissociated intelligence Other impairment of behaviour

Your intellectual faculties are restricted. Your behavior has changed as a result.

Intelligence involves various mental abilities. Intelligence can be assessed using certain tests. These are called intelligence tests or IQ tests. To take in and use new knowledge, we need mental abilities. These include the abilities to speak, to concentrate, and to memorize things. Under certain circumstances the mental abilities may not develop properly. You may then have difficulties in dealing with other people. Movements may also be changed.

There is a difference between the various abilities. This can include the ability to speak and act.

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).