Non-pressure chronic ulcer of buttock with necrosis of bone

This code represents a persistent, non-pressure-related open sore on the buttock that has progressed to involve the underlying bone tissue, indicating bone necrosis. This type of ulcer is typically caused by factors other than sustained pressure, such as vascular insufficiency, neuropathy, or trauma. The presence of bone necrosis signifies a severe and deep tissue injury.

Use this code when documentation clearly indicates a chronic ulcer on the buttock that is explicitly stated as non-pressure related and has confirmed necrosis of the bone. This often applies to patients with conditions like peripheral arterial disease, diabetes with neuropathy, or severe venous insufficiency. Supporting documentation should include physician notes detailing the ulcer's location, chronicity, etiology (non-pressure), and diagnostic findings confirming bone involvement.

• Ensure the documentation explicitly states "non-pressure" to differentiate from pressure ulcers.
• Confirm that bone necrosis is documented, not just deep tissue involvement or exposed bone without necrosis.
• Sequence this code after any underlying systemic disease contributing to the ulcer, such as diabetes mellitus or peripheral vascular disease.