Other secondary osteonecrosis, right toe(s)

This code signifies the death of bone tissue in the right toe(s) due to a secondary cause, meaning it's a consequence of another underlying condition or treatment rather than a primary, idiopathic process. This bone death can lead to pain, joint collapse, and functional impairment in the affected toe(s).

Use this code when documentation clearly indicates osteonecrosis of the right toe(s) that is attributed to an identifiable secondary etiology, such as corticosteroid use, trauma, radiation, or systemic diseases like lupus or sickle cell anemia. The physician's notes should specify the affected side and the secondary nature of the condition.

• Ensure the documentation specifies "secondary" osteonecrosis and the laterality (right toe(s)).
• Always code the underlying secondary condition first, if known and documented, as this code is a manifestation of that condition.
• Distinguish from primary (idiopathic) osteonecrosis, which would be coded differently.