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M22.0: Recurrent dislocation of patella

You have dislocated your kneecap.

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.

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

Note

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.

Source

Provided by the non-profit organization “Was hab’ ich?” gemeinnützige GmbH on behalf of the Federal Ministry of Health (BMG).