Unsp fracture of left patella, subs for clos fx w nonunion

This code describes a situation where a patient has a fracture of the left kneecap, but the specific type of fracture (e.g., transverse, comminuted) is not documented. Importantly, this is not the initial treatment for the fracture, and the bone fragments have failed to heal together properly, indicating a nonunion.

Use this code for follow-up encounters where a patient is being treated for a previously diagnosed, unspecified closed fracture of the left patella that has not united. This would include scenarios such as ongoing management, evaluation for surgical intervention to address the nonunion, or monitoring of conservative treatment for the nonunion.

• Always seek more specific documentation regarding the type of patellar fracture if available.
• Ensure documentation clearly indicates a "subsequent encounter" and "nonunion" for a closed fracture.
• Do not use for initial treatment of the fracture or for malunion, which is a different complication.