Non-prs chronic ulc unsp prt of l low leg w necrosis of bone

This code signifies a persistent open sore on an unidentifiable area of the left lower leg, not caused by pressure, that has progressed to involve the underlying bone tissue. This indicates a severe, deep ulceration with significant tissue destruction.

Apply this code when documentation specifies a chronic, non-pressure ulcer on the left lower leg where the exact location (e.g., calf, ankle) is not specified, and imaging or surgical findings confirm bone necrosis. This is appropriate for advanced stages of venous stasis ulcers, arterial ulcers, or neuropathic ulcers that have eroded to bone.

• Ensure documentation explicitly states "non-pressure" and "necrosis of bone."
• If the specific location on the left lower leg is known (e.g., calf, ankle), use a more specific code from the L97.92- subcategory.
• Always sequence this code after any underlying systemic condition causing the ulcer (e.g., diabetes mellitus, peripheral artery disease).