Unsp fx shaft of left ulna, subs for clos fx w malunion

This code signifies a previously sustained fracture of the shaft of the left ulna, where the specific type of fracture (e.g., transverse, oblique) was not documented. The fracture is now in a healing phase, but the bone segments have united in an anatomically incorrect or misaligned position, and the skin over the fracture site remains intact.

Apply this code when a patient presents for follow-up care of a left ulnar shaft fracture that is healing with malunion, and the initial fracture documentation lacked specificity regarding the fracture type. This is appropriate for subsequent visits after the initial treatment, where the malunion is being monitored or managed.

• Ensure documentation clearly states "malunion" and specifies the left ulna shaft.
• Verify that the encounter is for follow-up care, not the initial treatment of the fracture.
• Confirm the fracture was closed; if open, a different code would be necessary.