Other secondary osteonecrosis, unspecified humerus

This code signifies bone tissue death in the upper arm bone (humerus) that is not due to a primary bone disease, but rather a consequence of another underlying condition. This necrosis is not further specified as to its exact location within the humerus.

Apply this code when documentation indicates osteonecrosis of the humerus that is secondary to another disease process (e.g., steroid use, trauma, sickle cell disease), and the specific site within the humerus (e.g., head, shaft) is not documented. Supporting documentation should clearly state "secondary osteonecrosis" and specify the humerus as the affected bone.

• Ensure the documentation explicitly states "secondary" osteonecrosis; otherwise, consider primary osteonecrosis codes.
• If the specific site within the humerus (e.g., head, distal) is documented, a more specific code from the M87.32 series should be used.
• Always code the underlying cause of the secondary osteonecrosis first, if known and documented.