L83: Acanthosis nigricans

You have a condition with patches of skin that have turned dark.

This condition causes brown or black-colored patches of skin to develop. No clear edge can be seen between the affected areas and the surrounding skin. Thickened spots can also form on the changed surfaces. The patches of skin can feel like velvet on the surface or be rough. They may also be itchy.

The condition is mainly found in the armpits and the neck and in the inside of the elbows and the hollows of the knees. The external genitals and the area around the anus can also be affected.

This condition is caused by various things. These causes include different medicines and long-term diseases. Tumors can also cause these skin lesions. However, it is also possible that no cause will be found for the skin lesions.

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.


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