Nondisp seg fx shaft of humer, l arm, subs for fx w nonunion

This code describes a fracture in the middle section of the left upper arm bone that has broken into at least three pieces, but the bone fragments are still in their normal alignment. Importantly, this specific code indicates that the fracture has failed to heal properly and the patient is being seen for ongoing management of this nonunion.

This code is used for follow-up encounters when a patient with a left humeral shaft segmental fracture is experiencing nonunion. It applies when the fracture was initially nondisplaced and the patient is receiving treatment for the persistent lack of bone healing, such as surgical intervention for nonunion or ongoing conservative management.

• Ensure documentation clearly specifies "segmental" and "nondisplaced" for the humeral shaft fracture.
• Verify the encounter is for a subsequent visit related to the fracture and specifically addresses the nonunion.
• Confirm the laterality is "left arm" as specified by the 5th and 6th characters.