Other secondary osteonecrosis, left shoulder

This code signifies the death of bone tissue in the left shoulder joint due to a compromised blood supply, which is a consequence of another underlying medical condition or treatment. This is not primary osteonecrosis, but rather a secondary manifestation.

Apply this code when documentation clearly indicates osteonecrosis of the left shoulder that is attributed to a secondary cause, such as long-term corticosteroid use, trauma, radiation therapy, or a systemic disease like lupus or sickle cell anemia. Ensure the medical record specifies the left shoulder and the secondary nature of the osteonecrosis.

• Always code the underlying secondary condition first, if known and actively treated, followed by this code.
• Distinguish carefully between primary (idiopathic) osteonecrosis and secondary osteonecrosis based on provider documentation.
• Verify laterality (left vs. right) is explicitly stated; do not assume.