Non-pressure chronic ulcer of unsp thigh w necrosis of bone

This code signifies a persistent, non-pressure-related open sore on an unspecified thigh that has progressed to involve necrosis (tissue death) of the underlying bone. It indicates a severe, deep tissue injury not caused by sustained pressure, often associated with vascular insufficiency, neuropathy, or trauma.

Use this code when documentation clearly states a chronic ulcer on the thigh, explicitly noting that the ulcer is not pressure-related and has caused bone necrosis. This typically applies to patients with advanced peripheral arterial disease, diabetic neuropathy, or other conditions leading to severe tissue breakdown.

• Ensure documentation specifies "non-pressure" and "bone necrosis" for the thigh.
• Do not use for pressure ulcers; refer to the L89 category for those.
• Requires additional codes to identify the underlying cause of the ulcer (e.g., diabetes, peripheral vascular disease).