E87.0: Hyperosmolality and hypernatraemia

Your blood sodium levels were too high.

Sodium helps regulate the moisture content in the body. Conversely, the water content in the body affects the sodium content in the blood. The sodium content is controlled by many processes. The sodium content in the blood must be in a specific range for the body to be able to function.

Your blood sodium levels were too high. That can occur for instance if you lose a lot of water. It may be the case with severe sweating, severe diarrhea or severe burns. You may also have too much sodium in your blood if your body can no longer properly control the sodium content.

If the sodium content in your blood is too high, you may for instance feel very sleepy. Seizures may also occur.

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).