Osteonecrosis due to previous trauma, right humerus

This code signifies the death of bone tissue in the right humerus resulting from a prior traumatic injury. This condition, also known as avascular necrosis, occurs when the blood supply to the bone is disrupted, leading to bone collapse and potential joint destruction.

Apply this code when documentation clearly links osteonecrosis of the right humerus to a past traumatic event, such as a fracture or dislocation. The patient's history should explicitly state a previous injury to the right upper arm preceding the onset of osteonecrosis.

• Ensure the documentation specifies "previous trauma" as the etiology; otherwise, consider other M87 subcategories.
• Laterality is crucial; verify the right humerus is explicitly documented.
• Sequence this code as a primary diagnosis when the osteonecrosis is the reason for the encounter.