G56.2: Lesion of ulnar nerve

A nerve in your arm is damaged.

This nerve runs the entire length of the arm, from the shoulder to the hand. The nerve enables us to move our fingers, for example. The nerve is also responsible for sensation in the little finger and the ring finger.

The nerve may be damaged due to injuries or to pressure. The damage may be lasting or temporary.

This nerve in your arm has been damaged. This can cause, for example, tingling on the outside of one’s hand or little finger. One may also have a numb sensation. It may also no longer be possible to move the fingers as well as normal. The person may then be unable to flex their fingers properly any more, for example.

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).