Nondisp commnt fx unsp patella, subs for clos fx w malunion

This code signifies a follow-up encounter for a patellar fracture that has broken into multiple pieces but remains in its anatomical position. Crucially, the fracture is healing improperly, resulting in a malunion. The specific side (left or right) of the patella is not documented.

This code is appropriate for subsequent visits where a patient is being managed for a previously diagnosed comminuted patellar fracture that is now demonstrating signs of malunion. This could include follow-up imaging, physical therapy, or discussions regarding further intervention for the malunion. It is used when the laterality of the injury is not specified in the medical record.

• Ensure documentation clearly states "malunion" and "subsequent encounter" for a closed fracture.
• Verify that the fracture is described as "comminuted" and "nondisplaced."
• Only use this code when the medical record does not specify whether the left or right patella is affected.