M22.0: Recurrent dislocation of patella
The knee joint connects the thigh to the lower leg. The knee joint is made up of 3 bones. These bones are the thighbone (femur), the shinbone (tibia) and the kneecap. The kneecap sits in a groove at the front of the thighbone.
In your case, your kneecap has come out of the groove in your thighbone (femur). This can happen as a result of very normal movements not involving any excessive force. In certain circumstances this happens regularly. For example, when the muscles around the knee are too weak or when the kneecap is an unusual shape. If the kneecap has been dislocated in the past it will get dislocated again more easily.
When the kneecap comes out of the groove in the femur, tissue around the knee can get damaged. The knee can also be painful or swell up.
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.