Osteonecrosis in diseases classified elsewhere, right hand

This code describes the death of bone tissue in the right hand due to a lack of blood supply, occurring as a secondary manifestation of another underlying disease. This condition, also known as avascular necrosis, leads to bone collapse and subsequent arthritis if left untreated.

Use this code when documentation clearly indicates osteonecrosis affecting the right hand, and the provider has linked it to an underlying systemic disease (e.g., lupus, sickle cell disease, long-term corticosteroid use). The medical record should specify the affected hand and the primary condition causing the osteonecrosis.

• Always sequence the underlying disease first, as this code is for "diseases classified elsewhere."
• Ensure laterality (right hand) is clearly documented.
• Do not use this code for osteonecrosis due to trauma or idiopathic causes; specific codes exist for those scenarios.