Nondisp fx of lateral malleolus of unsp fibula, 7thK

This code signifies a fracture of the outer ankle bone (lateral malleolus) that is not displaced, meaning the bone fragments are still in their normal anatomical alignment. The "subsequent encounter" indicates the patient is receiving follow-up care for this fracture, and "nonunion" specifies that the bone has failed to heal completely after a period of time.

Use this code when a patient presents for ongoing treatment of a previously diagnosed, nondisplaced lateral malleolus fracture that has not healed. This applies to situations where the fracture is closed (skin intact) and the physician has documented nonunion. This code would be appropriate for clinic visits, cast changes, or imaging studies performed to assess the nonunion.

• Ensure documentation clearly states "nondisplaced" and "nonunion" for the lateral malleolus.
• Verify this is a subsequent encounter for the fracture, not the initial treatment.
• Always confirm the fracture is closed; open fractures have different coding.