Oth fx shaft of l ulna, 7thN

This code describes a situation where a patient has sustained an open fracture of the shaft of their left ulna, specifically a severe open fracture (Type IIIA, IIIB, or IIIC), and the fracture has failed to heal properly (nonunion). This encounter is for ongoing treatment of this nonunion.

This code is appropriate for follow-up encounters where a patient is receiving care for a previously diagnosed open fracture of the left ulnar shaft that has progressed to nonunion. This includes scenarios such as surgical intervention for nonunion, cast changes, or evaluation of healing progress for a nonunion.

• Ensure documentation clearly specifies the left ulna and confirms an open fracture type IIIA, IIIB, or IIIC.
• Verify that the encounter is for the nonunion of the fracture, not the initial injury or routine healing.
• Always sequence this code after the primary reason for the encounter, if applicable.