F00.0: Dementia in Alzheimer disease with early onset

You have dementia due to Alzheimer’s disease.

With Alzheimer’s disease, the nerve cells in the brain degenerate. Certain proteins are also deposited in the brain. The exact cause of the disease is not yet known.

In your case, the Alzheimer’s disease began before you were 65.

The disease causes dementia. The memory can gradually deteriorate. It may be difficult to remember the right word for something. There may also be confusion. You might not know exactly where you are. You can become suspicious or anxious about other people. Alzheimer’s disease can also change one’s personality.

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).