Path fx in oth disease, oth site, subs for fx w malunion

This code signifies a bone fracture that occurred due to an underlying disease process, rather than trauma, affecting a location other than the spine, hip, or major long bones. The fracture has healed improperly, resulting in a malunion, and the patient is receiving ongoing care for this complication.

Apply this code when a patient presents for follow-up treatment of a malunited pathological fracture in an unspecified or less common anatomical site (e.g., foot, hand, rib). Documentation should clearly state a pathological fracture etiology, evidence of malunion (e.g., imaging reports, physician notes describing deformity or functional impairment), and indicate that this is not the initial encounter for the fracture.

• Always sequence this code after the underlying disease causing the pathological fracture (e.g., osteoporosis, metastatic cancer).
• Ensure documentation specifies "malunion" and not just "nonunion" or "delayed healing," as these have distinct codes.
• Verify the fracture site is not specifically covered by more granular codes for pathological fractures of the spine, hip, or other major sites.