Unsp fx left femur, subs for opn fx type I/2 w malunion

This code signifies a previously sustained, unspecific fracture of the left femur that has developed malunion. This particular encounter is for the ongoing management or treatment of the malunion, specifically when the original fracture was an open fracture classified as Type I or II.

Use this code for follow-up encounters where a patient is being treated for a malunion of an unspecified left femoral fracture, and the initial injury was an open fracture (Type I or II). This would include scenarios such as surgical correction of the malunion, cast changes, or physical therapy for the malunion during the healing phase.

• Ensure documentation clearly specifies "malunion" and that the original fracture was an open Type I or II.
• Verify the laterality (left femur) is explicitly stated in the medical record.
• Do not use for nonunion; a different code would apply for that complication.