Oth fx lower end of unsp ulna, subs for clos fx w malunion

This code signifies a fracture of the lower portion of the ulna, where the specific side (left or right) is not documented. The fracture has been previously treated and is now in a healing phase, but with an imperfect alignment of the bone fragments (malunion).

Apply this code when a patient presents for follow-up care of a previously treated, unspecified ulnar fracture that has healed with malunion. This is appropriate for subsequent encounters where the primary focus is managing the complications of the malunion rather than initial treatment of the acute fracture.

• Ensure documentation clearly states "malunion" and that the encounter is for follow-up care, not initial treatment.
• Verify that the specific side of the ulna (left or right) is not documented; otherwise, a more specific code should be used.
• This code is for closed fractures; open fractures with malunion would require a different code.