Unsp fx left patella, subs for opn fx type I/2 w delay heal

This code signifies an unspecified break in the left kneecap that was initially an open fracture (where the bone broke through the skin or was exposed to the outside environment). The patient is currently in a follow-up phase, and the fracture is not healing as expected, indicating delayed union.

This code is appropriate for documenting a patient visit concerning a left patellar fracture that was initially open (Type I or II) and is now experiencing delayed healing. This would be used during subsequent encounters after the initial treatment of the open fracture. It applies when the specific type of patellar fracture (e.g., transverse, comminuted) is not documented.

• Ensure documentation clearly states "delayed healing" for the open patellar fracture.
• Verify the laterality is specifically "left" and the encounter is "subsequent."
• Do not use for initial treatment or for fractures healing normally.