L57.0: Actinic keratosis

You have a condition on patches of skin that are exposed to a lot of sunlight.

The first sign of this skin condition is small rough patches appearing on the skin. The changed areas can be skin-colored to red-brown. After a few months or years the changed patches can become larger and also spread. They can also become higher than the skin around it. The surface of the changed patches can become whitish and feel hard. Scraping or scratching the changed patches makes the skin underneath bleed.

The cause of this disorder is damage to the cells in the skin. This can happen if the skin has been damaged by sunlight over many years. Areas of the skin such as the face or backs of the hands that have got a lot of sunlight are therefore 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).