M96: Postprocedural musculoskeletal disorders, not elsewhere classified

M96.0: Pseudarthrosis after fusion or arthrodesis

After various operations, bones may not knit. This can happen after an operation to brace your spine or joints, for example. In spinal bracing surgery, adjacent vertebrae are joined together. The vertebrae should then grow together. In an operation to brace joints, the bones that form the joint are connected.

There are various reasons why, after an operation, bones do not knit. The bones may not be properly connected. It is also possible that the bones or the surrounding tissue have become inflamed. Bones will also fail to knit if they are not getting a proper supply of blood.

If the bones fail to knit after an operation, it can cause problems. The affected site may then be less stable. You may be unable to use the affected part of your body properly. It can also be painful. The pain particularly occurs when the affected site is subjected to pressure.