Osteonecrosis in diseases classd elswhr, left upper arm

This code signifies the death of bone tissue in the left upper arm due to a lack of blood supply, occurring as a manifestation or complication of another underlying disease. This condition, also known as avascular necrosis, leads to bone collapse and joint destruction if untreated.

Apply this code when documentation specifies osteonecrosis of the left humerus or shoulder region, and explicitly links it to an underlying systemic disease (e.g., lupus, sickle cell anemia, steroid use). Ensure the physician's notes clearly state the affected side and the causal relationship to another classified condition.

• Always sequence the underlying disease code first, as this code indicates "in diseases classified elsewhere."
• Verify laterality; this code is specific to the left upper arm.
• Distinguish from osteonecrosis not associated with another classified disease, which would use a code from M87.xx.