Non-prs chronic ulcer oth prt left foot w necrosis of muscle

This code signifies a persistent open sore on a part of the left foot, excluding the heel or forefoot, that is not caused by pressure. The ulceration has progressed to involve the muscle tissue, indicating significant tissue damage and depth.

Use this code when documentation specifies a chronic, non-pressure ulcer located on the midfoot, hindfoot (excluding heel), or other unspecified part of the left foot, with a documented depth of necrosis extending into the muscle. This typically applies to ulcers resulting from conditions like peripheral arterial disease, diabetes, or venous insufficiency, where muscle involvement is explicitly noted.

• Ensure documentation clearly specifies "non-pressure" and the exact location on the left foot (e.g., midfoot, dorsum, plantar aspect excluding forefoot/heel).
• Verify the depth of necrosis explicitly states "muscle" involvement; do not assume based on size or appearance.
• Always code an underlying condition (e.g., E11.621 for diabetic foot ulcer) as the primary diagnosis, with this code as a secondary diagnosis.