Q80.1: X-linked ichthyosis

You have a congenital disorder that makes your skin dry and flaky.

The top of layer of skin is made up of skin cells that are keratinized. These skin cells are initially in one of the lower skin layers. When the skin cells migrate upwards toward the skin’s surface, they keratinize, forming a solid layer.

The genetic information in your cells has changed. This disrupts the keratinization of your skin.

This condition causes the skin to be dry, rough and flaky. The scales may appear gray. It can also affect the skin all over the body. The insides of the joints can remain free of changes.

Certain forms of the condition can also produce other symptoms. The symptoms can also affect other parts of the body.

This disease is hereditary. Other family members may also be affected. Boys and men are particularly affected.

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).