Other secondary osteonecrosis of left radius

This code signifies osteonecrosis affecting the left radius that is a consequence of another underlying condition or factor, rather than being primary (idiopathic). It indicates the death of bone tissue in the left forearm bone due to impaired blood supply, where the etiology is secondary.

Apply this code when documentation clearly states osteonecrosis of the left radius and specifies a secondary cause, such as corticosteroid use, trauma, radiation, or a systemic disease like lupus or sickle cell anemia. Ensure the medical record distinguishes it from primary (idiopathic) osteonecrosis.

• Always sequence the underlying secondary condition first, if known and applicable, followed by this code.
• Verify laterality (left radius) is explicitly documented; avoid assuming.
• Differentiate from M87.032 (idiopathic osteonecrosis of left radius) and M87.132 (drug-induced osteonecrosis of left radius).