Other osteonecrosis, left tibia

This code signifies the death of bone tissue in the left tibia due to a loss of blood supply, not otherwise specified as spontaneous, drug-induced, or due to trauma, previous collapse, or other specific causes. This condition can lead to pain, joint dysfunction, and eventual bone collapse if untreated.

Apply this code when documentation clearly indicates osteonecrosis affecting the left tibia, and the specific etiology (e.g., spontaneous, drug-induced, post-traumatic) is not identified or falls outside the more specific M87 subcategories. Supporting documentation would include imaging reports (MRI, X-ray, bone scan) confirming osteonecrosis in the left tibia, and physician notes detailing the diagnosis and affected site.

• Ensure the laterality (left) is explicitly documented for the tibia.
• Always attempt to identify a more specific etiology of osteonecrosis if available in the documentation (e.g., M87.1- for drug-induced, M87.3- for other secondary).
• Code any associated pathological fractures separately if present and documented.