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M90.47: Osteonecrosis due to haemoglobinopathy Ankle and foot

Bone tissue in your ankle or foot has died off due to a blood disorder.

Blood is made up of a liquid part and different blood cells, among other things. The blood cells include the red blood cells, the white blood cells and the platelets. The red blood cells carry oxygen from the lungs throughout the body. Red blood cells contain the red hemoglobin that gives blood its color. This pigment is important for carrying oxygen in the blood.

The blood disorder involves the red hemoglobin not forming correctly. If the red hemoglobin does not form correctly, it may be unusually shaped. Unusually shaped red hemoglobin can block blood vessels. When blood vessels get blocked the supporting tissue does not get enough blood. Bone tissue with an inadequate blood supply can die off.

When bone tissue has died off, the affected area can be painful. You may also no longer be able to move the affected site properly.

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).