Oth fx lower end l ulna, subs for opn fx type I/2 w malunion

This code signifies a fracture of the lower portion of the left ulna, excluding specific types like Salter-Harris or epiphyseal, that was initially an open fracture of type I or II. The current encounter addresses a complication where the bone has healed in an anatomically incorrect or misaligned position.

Use this code when documenting follow-up care for a patient with a previously sustained open fracture (Type I or II) of the distal left ulna, and imaging or clinical assessment confirms malunion. This applies to situations where the malunion itself is being managed, or when the patient is seen for ongoing issues related to the malunion.

• Requires a seventh character "Q" to indicate subsequent encounter for malunion.
• Ensure documentation clearly specifies "other fracture" of the lower ulna and the initial open fracture type (I or II).
• Always sequence this code after any codes for the primary reason for the encounter, if applicable.