M88.0: Paget disease of skull

You have a condition that involves bone changing radically.

This has affected bone in your head.

Bones consist mainly of bone cells, certain proteins and various minerals. The minerals include calcium and phosphate, in particular. The bone tissue is constantly being broken down and built up again. This enables bones to adapt well to loading. There is usually a balance between the growth and breakdown of bone tissue.

With this disorder, the balance between bone being broken down and bone growing is disturbed. Initially, more bone tissue than usual is broken down. More new bone forms as a result. The new bone is less stable. As a result, the bone can become deformed more easily, or even break.

The newly formed bone can make the head larger. This may be noticeable when a cap or hat becomes too small. The skin over the affected bone may be hotter than usual. You may also have pain.

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).