N25.0: Renal osteodystrophy

Your kidneys are not working properly. This has also affected your bones.

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. If the kidneys do not work properly, the levels of important messenger substances and salts in the blood may change.

The kidneys are also involved in the production of vitamin D. If the kidneys do not work properly, the body may not produce enough vitamin D.Vitamin D is important for bone strength. Calcium and phosphate are stored in the bones by vitamin D. Bone thus hardens. Vitamin D is also important for the maturation of immune cells and muscular strength.

The body can create vitamin D itself. This requires direct sunlight. You can also take vitamin D with food. However, this only makes up a small part of your body’s vitamin D. There is vitamin D in fatty sea fish and offal, for example.

Changes in blood salts and vitamin D deficiency can affect bones. Pain and bone deformations may occur at the affected areas.

If the kidneys stop working properly during childhood, the child may not grow normally.

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).