Oth fracture of unsp patella, subs for clos fx w nonunion

This code signifies a fracture of the kneecap that is not specifically classified as a different type, where the exact location on the patella is unknown. The fracture has failed to heal properly and the patient is presenting for follow-up care, with the skin over the fracture remaining intact.

This code is appropriate for patients presenting for ongoing treatment of a patellar fracture that has not united, following an initial encounter. It applies when the specific type of patellar fracture (e.g., transverse, comminuted) is not documented, and the fracture site on the patella is also unspecified. Use this code for subsequent visits related to the nonunion of a closed patellar fracture.

• Ensure documentation clearly states "nonunion" and "subsequent encounter" for a closed patellar fracture.
• Verify that no more specific type or location of patellar fracture is documented; otherwise, a more precise code should be used.
• This code requires an external cause code to fully describe the injury event.