Osteonecrosis in diseases classd elswhr, left shoulder

This diagnosis code signifies the death of bone tissue in the left shoulder joint due to a loss of blood supply, occurring as a manifestation or complication of another underlying medical condition. It represents avascular necrosis of the humeral head or glenoid, secondary to a systemic disease.

Apply this code when documentation clearly indicates osteonecrosis affecting the left shoulder, and the provider explicitly links it to an underlying systemic disease (e.g., lupus, sickle cell anemia, chronic corticosteroid use). Supporting documentation should specify the affected side and the primary condition causing the osteonecrosis.

• Always sequence the underlying systemic disease first, followed by this code.
• Ensure the documentation specifies "left shoulder" and not a generalized or unspecified shoulder involvement.
• Distinguish from primary or idiopathic osteonecrosis, which would be coded differently.