Osteonecrosis due to previous trauma, unspecified shoulder

This code signifies the death of bone tissue in an unspecified shoulder joint, specifically attributed to a prior traumatic injury. This avascular necrosis results from impaired blood supply to the bone, leading to bone collapse and joint destruction over time.

Apply this code when documentation clearly links osteonecrosis of the shoulder to a history of trauma, such as a fracture or dislocation, and the specific shoulder (left or right) is not documented. Supporting documentation would include imaging reports (MRI, X-ray) confirming osteonecrosis and clinical notes detailing the previous traumatic event.

• Ensure the documentation explicitly states "due to previous trauma" to differentiate from other etiologies of osteonecrosis.
• If the specific shoulder (left or right) is known, use the more specific codes M87.211 (right) or M87.212 (left).
• Code any associated pain or functional limitations separately, if documented.