Displ transverse fx l patella, subs for clos fx w nonunion

This code indicates a fracture of the left patella (kneecap) that has broken completely across its width and the bone fragments are not properly aligned. This specific code is used when the patient is receiving follow-up care for this fracture, and the bone has failed to heal despite treatment (nonunion), with the skin over the fracture remaining intact.

Apply this code for patients presenting for ongoing management of a previously diagnosed displaced transverse fracture of the left patella where nonunion has been identified. This includes visits for evaluation of nonunion, planning for revision surgery, or conservative management of the nonunion.

• Ensure documentation clearly states "nonunion" and specifies the "left" patella.
• Verify the fracture type is "transverse" and "displaced."
• Confirm this is a "subsequent encounter" for care related to the nonunion.