F23.3: Other acute predominantly delusional psychotic disorders

You are temporarily perceiving reality incorrectly. You are also seeing or hearing things that are not there.

Mental conditions exist as a result of which one interprets reality incorrectly. One may then see or hear things that are not really there. One’s behavior may also change.

When one interprets reality incorrectly, one has delusions.

When one maintains a belief despite counter-arguments, one has a delusion. But this belief has nothing to do with reality. For example, one might be convinced that one is a famous person, or has been cheated, or is being persecuted. A delusion can take on very different forms. However, one cannot be persuaded that the delusion is not reality.

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).