M21.63: Acquired splay foot [pes transversoplanus]

Your foot is shaped differently than normal.

The sole of the foot is arched upwards slightly at the front from right to left. The arch distributes the pressure across the sole of the foot when walking and standing. Your foot has less of an upward arch from right to left. As a result, your foot seems wider than is normal.

When the foot is less arched than usual, the person may have pain when walking or standing, for example. The skin may also become thicker in some places on the sole of the foot. Sometimes you can also have no symptoms at all.

The foot can be deformed as a result of a different illness or an injury, for example. The foot also sometimes becomes deformed from wearing unsuitable shoes.

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).