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

This code signifies a fracture that occurred due to an underlying disease weakening the bone, rather than trauma, and is now healing incorrectly (malunion). The specific disease causing the bone fragility is not identified, and the fracture location is unknown. This code is used for follow-up care after the initial treatment of the fracture.

Use this code for patients presenting for ongoing management of a pathological fracture that has healed in a misaligned or deformed position. Documentation should clearly indicate a pathological fracture, evidence of malunion, and that this is not the initial encounter for the fracture. This code is appropriate when the underlying disease is not specified in the medical record.

• Always sequence this code after the code for the underlying disease, if known and documented.
• Ensure documentation explicitly states "malunion" and "pathological fracture" to support code assignment.
• Avoid using this code if the fracture is still actively healing without malunion; consider codes for routine healing or nonunion.