Other secondary osteonecrosis, left hand

This code indicates the presence of bone tissue death in the left hand that is not due to primary causes, but rather secondary to another underlying condition or event. This osteonecrosis results from an interruption of blood supply to the bone, leading to cellular death and potential bone collapse.

Use this code when documentation specifies osteonecrosis of the left hand and clearly identifies a secondary cause, such as steroid use, trauma, systemic lupus erythematosus, or sickle cell disease. The physician's notes should explicitly state "secondary osteonecrosis" and specify the left hand as the affected site.

• Always code the underlying secondary condition first, followed by this code.
• Ensure the documentation specifies "secondary" osteonecrosis; do not use for primary or idiopathic forms.
• Verify laterality (left hand) is clearly documented to avoid miscoding.