Other secondary osteonecrosis, unspecified shoulder

This code signifies the death of bone tissue in an unspecified shoulder joint due to a cause other than primary osteonecrosis. This secondary form of osteonecrosis results from an underlying condition or external factor disrupting the blood supply to the bone.

Apply this code when documentation confirms avascular necrosis of the shoulder, and the etiology is clearly secondary but not further specified (e.g., steroid-induced, post-traumatic, or associated with systemic disease). This code is appropriate when the specific bone affected within the shoulder (e.g., humeral head) is not documented.

• Ensure documentation specifies "secondary" osteonecrosis; otherwise, consider primary osteonecrosis codes.
• Always attempt to code the underlying cause of the secondary osteonecrosis first, if known and documented.
• Avoid using this code if the specific bone of the shoulder (e.g., humeral head, glenoid) is identified; instead, use a more specific code from the M87.31- subcategory.