N25.1: Nephrogenic diabetes insipidus

Your kidneys are not working properly. This means you have to urinate frequently.

There are normally 2 kidneys in the body. They filter blood and create urine. They thus help to detoxify the body. Furthermore, the kidneys regulate the blood pressure and salt content in the blood, among other things.

Urine is concentrated in the kidneys. The kidneys are stimulated by a messenger substance from the brain. However, your kidneys are not responding properly to this messenger substance. This means that your kidneys cannot concentrate the urine sufficiently. So people with this condition need to urinate frequently and also often feel very thirsty.

It may also alter the salt levels in the blood. Changes to the salt levels in the blood can make you feel weak or confused.

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).