M75.4: Impingement syndrome of shoulder

Tissue beneath the top of your shoulder blade has become pinched.

The acromion is a bony protrusion at the top of the shoulder blade. The acromion can be felt as a small bump on top of the shoulder. Various muscles and tendons run beneath the acromion. These muscles enable the arm to be lifted, for example.

The space below the top of your shoulder blade can become narrower than usual due to wear and tear or after an injury, for example. Then tissue such as muscles or tendons can become pinched.

When tissue beneath the top of the shoulder blade gets pinched, it can be painful. It may then be particularly painful when you raise your arm or lie on the affected side.

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).