Non-pressure chronic ulcer of buttock w necrosis of muscle

This code signifies a persistent, non-pressure-related open sore located on the buttock that has progressed to involve the muscle tissue, indicating significant tissue death. It describes a deep ulceration not caused by sustained pressure, characterized by necrotic muscle.

Apply this code when documentation clearly states a chronic ulcer on the buttock, explicitly noting that the necrosis extends into the muscle layer. This is appropriate for ulcers resulting from conditions like peripheral vascular disease, diabetes, or venous insufficiency, but not decubitus ulcers.

• Ensure the documentation specifies "non-pressure" to differentiate from pressure ulcers.
• Verify the depth of the ulceration explicitly states "necrosis of muscle" or similar terminology.
• Always code any underlying systemic conditions (e.g., diabetes mellitus with ulcer) first, followed by this code.