Unsp fx shaft of unsp tibia, subs for clos fx w malunion

This code signifies a fracture of the main part (shaft) of the tibia, where the specific location or type of fracture is not documented. It indicates that the patient is in a later stage of healing for a closed fracture (skin intact), but the bone fragments have healed in an incorrect or misaligned position, requiring ongoing care.

Apply this code when documentation confirms a subsequent encounter for a closed tibial shaft fracture that has healed with malunion, but the precise location or nature of the fracture within the shaft is not specified. This is appropriate for follow-up visits, cast changes, or physical therapy sessions related to the malunion.

• Ensure the documentation clearly states "malunion" and "subsequent encounter" for a closed fracture.
• Avoid using this code if the specific location of the tibial shaft fracture (e.g., proximal, distal) is documented; instead, use a more specific code.
• Pair this code with external cause codes (e.g., V00-Y99) and place of occurrence codes (e.g., Y90-Y99) if the initial injury details are available and relevant to the current encounter.