Non-prs chronic ulcer of left ankle w necrosis of muscle

This code signifies a persistent, open sore on the left ankle that is not caused by pressure, and where there is documented death of muscle tissue within the ulcer bed. It indicates a severe stage of a chronic ulcer, often associated with underlying vascular insufficiency, neuropathy, or systemic disease.

Apply this code when documentation clearly states a non-pressure chronic ulcer located on the left ankle with evidence of muscle necrosis. This typically occurs in patients with advanced peripheral arterial disease, diabetic foot ulcers, or other conditions leading to poor tissue perfusion and breakdown. Supporting documentation must specify the laterality, chronicity, and the presence of muscle involvement.

• Ensure documentation explicitly states "non-pressure" to differentiate from pressure ulcers.
• Verify laterality (left ankle) and the specific tissue involvement (muscle necrosis).
• Always sequence this code after any underlying systemic conditions contributing to the ulcer (e.g., E11.621 for diabetic ulcer with foot ulcer).