Osteonecrosis in diseases classd elswhr, left lower leg

This code signifies the death of bone tissue in the left lower leg due to a loss 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 can result in significant pain and joint dysfunction.

Apply this code when documentation specifies osteonecrosis affecting the left lower leg, and the physician explicitly links it to an underlying systemic disease (e.g., lupus, sickle cell anemia, chronic corticosteroid use). Ensure the medical record clearly identifies the specific underlying disease responsible for the osteonecrosis.

• Always code the underlying systemic disease first, followed by this code to indicate the manifestation.
• Confirm the laterality (left) and anatomical site (lower leg) are precisely documented.
• Do not use this code for osteonecrosis due to trauma or idiopathic causes; specific codes exist for those scenarios.