Path fx in oth disease, r ankle, subs for fx w nonunion

This code signifies a pathological fracture of the right ankle that occurred due to an underlying disease process, not trauma. It specifically indicates that the patient is in a subsequent phase of care for this fracture, and the fracture has failed to heal properly (nonunion).

Apply this code when a patient presents for ongoing treatment of a right ankle pathological fracture that has not united. Documentation should clearly state "nonunion" and specify the right ankle as the fracture site, along with the underlying disease causing the pathological fracture (e.g., osteoporosis, metastatic cancer). This code is used after the initial encounter for the fracture.

• Requires an additional code for the underlying pathological condition.
• Distinguish from malunion; nonunion implies complete failure to heal.
• Ensure laterality (right ankle) is explicitly documented.