Displ longitud fx right patella, subs for clos fx w nonunion

This code describes a situation where a patient has a right patella (kneecap) fracture that runs lengthwise and is no longer in its proper anatomical position. The fracture was initially treated without surgery (closed fracture), but the bone has failed to heal properly, indicating a nonunion.

Use this code for follow-up encounters where a patient is being managed for a previously diagnosed displaced longitudinal fracture of the right patella that has not united. This applies when the initial treatment was non-surgical and the nonunion is confirmed.

• Ensure documentation clearly states "nonunion" and specifies the right patella.
• Verify the fracture type is "longitudinal" and "displaced."
• This code is for subsequent encounters; an initial encounter would use a different code.