Non-prs chronic ulcer oth prt unsp foot w fat layer exposed

This code signifies a persistent open sore on an unspecified part of the left foot, not caused by pressure, where the ulceration extends through the epidermis and dermis, exposing the subcutaneous fat layer. This indicates a moderate depth of tissue loss, typically associated with underlying vascular insufficiency, neuropathy, or other systemic conditions.

Apply this code when documentation specifies a chronic, non-pressure ulcer located on the left foot, and the deepest extent of tissue loss is clearly described as reaching the subcutaneous fat. This is appropriate for ulcers documented as Stage 3 if using a staging system that correlates to tissue depth, or when the physician explicitly states "fat layer exposed."

• Ensure the documentation specifies "left foot" and "fat layer exposed" for accurate coding.
• Distinguish from pressure ulcers (L89.-) and acute ulcers (e.g., traumatic ulcers).
• Always code any underlying systemic conditions (e.g., diabetes mellitus, peripheral artery disease) as primary or secondary diagnoses, as appropriate, to fully explain the patient's condition.