G30.9: Alzheimer disease, unspecified

You have a dementia disease.

With dementia, the brain is no longer able to carry out various tasks so well. As a result, your memory will gradually get worse. You are finding it difficult to memorize new things. You may no longer be judging everyday situations so well. You sometimes possibly do not know where you are. The disease makes it difficult to deal with everyday life. It is often difficult to remember the right word for something. One’s personality may also change. For example, you may become very distrustful, or have the feeling that people are stealing your property.

Proteins are being deposited in your brain. These proteins are damaging your brain. As a result, your brain is no longer able to carry out its various tasks so well. This disease is called Alzheimer’s disease.

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.


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