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

This code indicates a fracture of the upper part of the left humerus, where the specific type of fracture (e.g., surgical neck, anatomical neck, greater tuberosity) is not documented. The fracture has previously been treated, but has healed in an unsatisfactory position, leading to a malunion.

This code is appropriate for follow-up encounters where a patient is being managed for a previously treated, unspecified fracture of the upper left humerus that has resulted in a malunion. This could include evaluation for corrective surgery, physical therapy for functional deficits due to the malunion, or ongoing pain management.

• Ensure documentation clearly states "malunion" and specifies the left humerus.
• This code is for subsequent encounters; an initial encounter would use an initial encounter code (e.g., S42.202A).
• Always query the provider if the specific type of upper humeral fracture is not documented to allow for more specific coding.