Osteolysis, left ankle and foot

This diagnosis code signifies the pathological destruction or dissolution of bone tissue specifically affecting the left ankle and/or foot. It indicates a progressive loss of bone mass in this anatomical region, which can lead to structural weakness and pain.

Apply this code when documentation clearly states osteolysis is present in the left ankle or foot. This typically occurs in conditions such as inflammatory arthritis, infection, tumor, or post-traumatic complications. Supporting documentation should include imaging reports (X-ray, MRI, CT) confirming bone destruction in the specified location.

• Ensure laterality is precisely documented; do not use this code for unspecified or bilateral osteolysis.
• Always code the underlying cause of the osteolysis first, if known and documented (e.g., specific arthritis, infection).
• Distinguish from osteopenia or osteoporosis, which represent reduced bone density rather than active bone destruction.