M75.4: Impingement syndrome of shoulder
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.
Patient Disclaimer
The information provided on this page is for general educational purposes only. It is not intended for self-diagnosis and does not replace professional medical advice. Always consult your doctor or a qualified healthcare provider with any questions or concerns about your health.
If you see an ICD diagnosis code (e.g., on a medical report), be aware that doctors may also include additional indicators to express diagnostic certainty. Only a healthcare professional can interpret these codes accurately in the context of your individual case.
For a complete understanding of your condition and what the diagnosis means for you, please speak directly with your doctor.