Unsp fx lower end of unsp tibia, subs for clos fx w nonunion

This code indicates a fracture of the lower part of the shin bone (tibia) where the specific type of fracture is not documented. The injury is a closed fracture, meaning the skin was not broken, and the bone has failed to heal properly after an initial treatment attempt. This code is used for follow-up care for this specific nonunion.

Apply this code for subsequent encounters when a patient presents with a previously diagnosed, but unspecified, closed fracture of the distal tibia that has not united. This includes situations where the patient is undergoing ongoing management, such as cast changes, physical therapy, or preparation for surgical intervention for the nonunion.

• Ensure documentation clearly states "nonunion" for a previously closed fracture.
• Verify that the fracture location is the "lower end of the tibia" and that the specific fracture type is not specified.
• Confirm this is a subsequent encounter for ongoing care, not the initial treatment.