B01.1: Varicella encephalitis

You have chickenpox. The chickenpox has also spread to your brain.

Chickenpox are caused by specific pathogens. These pathogens are viruses. With chickenpox, small red blisters and pustules form all over the body. Blisters do not form on the palms of the hands or soles of the feet. These blisters and pustules can be very itchy. You may also get a fever.

Your brain has been inflamed by chickenpox. If the brain is inflamed, this can cause various symptoms. You can lose consciousness and get attacks of cramp. Your own behavior and thinking may change. You may sometimes no longer be able to control your own movements.

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).