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

This code signifies a persistent, non-pressure-related open sore on an unspecified area of the foot, excluding the heel or midfoot. The ulceration has progressed to involve the underlying muscle tissue, indicating significant tissue damage and depth.

Apply this code when documentation specifies a chronic, non-pressure ulcer located on a foot, without further anatomical specificity (e.g., "foot ulcer" without laterality or specific site). Crucially, the medical record must explicitly state the presence of muscle necrosis within the ulcer bed.

• Ensure documentation clearly distinguishes between pressure and non-pressure ulcers.
• Verify the depth of the ulceration; "necrosis of muscle" is a key specificity for this code.
• Avoid using this code if a more specific foot location (e.g., heel, midfoot) is documented; use the appropriate L97.5- subcategory.