Non-prs chronic ulcer of right calf w necrosis of muscle

This code signifies a persistent, open sore on the right lower leg (calf) that is not caused by pressure. The ulceration has progressed to involve the muscle tissue, indicating significant tissue death (necrosis) beyond the skin and subcutaneous layers. This condition often arises from underlying vascular insufficiency, neuropathy, or other systemic diseases.

Apply this code when documentation clearly states a chronic, non-pressure ulcer located specifically on the right calf. The medical record must also explicitly indicate the presence of muscle necrosis within the ulcer bed. This code is appropriate for conditions like venous stasis ulcers or diabetic ulcers that have advanced to this severe stage.

• Ensure documentation specifies "right calf" and "necrosis of muscle" to support this granular code.
• Distinguish from pressure ulcers (L89.-) and ulcers with necrosis limited to skin/subcutaneous tissue (L97.212).
• Always code any underlying systemic conditions (e.g., diabetes mellitus, peripheral vascular disease) that contribute to the ulcer formation.