Path fracture, left finger(s), subs for fx w malunion

This code signifies a fracture of one or more bones in the left finger(s) that occurred due to an underlying disease process, rather than trauma. The fracture is currently in a healing phase, but the bone fragments have united in an abnormal position, leading to functional impairment or cosmetic deformity.

Apply this code when documentation specifies a pathological fracture of the left finger(s) and indicates that the patient is receiving ongoing treatment for a malunion of that fracture. This typically applies to follow-up visits, cast changes, or surgical interventions to correct the malunion. The medical record must clearly state "pathological fracture" and "malunion."

• Always sequence the underlying disease causing the pathological fracture first, if known and still active.
• Distinguish between malunion (healed in poor alignment) and nonunion (failure to heal).
• Ensure the laterality (left finger) is explicitly documented to support this specific code.