Displaced transcondy fx l humerus, subs for fx w nonunion

This code describes a specific fracture of the lower end of the left humerus, extending across the condyles, which has shifted out of its normal alignment. The "subsequent encounter" indicates the patient is receiving ongoing care for this fracture, and "nonunion" signifies that the bone fragments have failed to heal together after a typical healing period.

Use this code for follow-up visits, cast changes, or surgical interventions for a previously diagnosed displaced transcondylar fracture of the left humerus that has not united. This applies when the physician is actively managing the nonunion, such as planning or performing bone grafting, internal fixation revision, or other procedures to promote healing.

• Ensure documentation clearly states "left humerus," "transcondylar," "displaced," and "nonunion."
• Verify this is a subsequent encounter, not the initial treatment for the fracture.
• Distinguish from malunion, which implies healing in an incorrect position, rather than a complete failure to heal.