Unsp physl fx upr end humer, l arm, subs for fx w malunion

This code describes a fracture of the growth plate (physis) at the top of the left humerus, where the specific type of physeal fracture is not documented. The fracture has previously occurred and is now being treated for a complication where the bone fragments have healed in an abnormal alignment.

Use this code for follow-up encounters when a patient is being managed for a malunion of an unspecified physeal fracture of the proximal left humerus. This applies when the initial injury was to the growth plate, and the current encounter addresses the improper healing.

• Ensure documentation specifies "left arm" and "subsequent encounter for fracture with malunion."
• Verify that the original fracture was indeed physeal and located at the upper end of the humerus.
• Do not use for initial encounters or for nonunion, which is a different complication.