Unsp fx upper end of unsp humerus, subs for fx w malunion

This code signifies an unspecific fracture of the upper part of the humerus that has previously been treated, but has healed in an abnormal position (malunion). The exact location of the fracture within the upper humerus is not specified, nor is the laterality (left or right arm).

Apply this code when documentation indicates a patient is presenting for follow-up care of a previously treated proximal humerus fracture that has resulted in malunion. This is appropriate when the initial fracture type (e.g., surgical neck, anatomical neck) is not specified in the current encounter documentation.

• Ensure documentation explicitly states "malunion" for a previously treated fracture.
• Avoid using this code if the specific anatomical site of the proximal humerus fracture (e.g., surgical neck) is known; a more specific code should be sought.
• This code is for subsequent encounters; do not use for initial treatment of the fracture.