Non-pressure chronic ulcer of buttock with fat layer exposed

This code signifies a persistent, non-pressure-related open sore located on the buttock, where the ulceration extends through the dermis and subcutaneous tissue, exposing the underlying adipose (fat) layer. It indicates a deep tissue loss that is not caused by sustained pressure.

Use this code for chronic ulcers on the buttock documented as non-pressure-related, such as those due to venous insufficiency, arterial insufficiency, or neuropathic causes, where the depth of tissue loss clearly exposes subcutaneous fat. Documentation must explicitly state "non-pressure ulcer," "buttock," and "fat layer exposed" or similar terminology indicating this depth.

• Differentiate carefully between pressure ulcers (L89.-) and non-pressure ulcers; the etiology is key.
• Ensure documentation specifies the anatomical site (buttock) and the exact depth of tissue involvement (fat layer exposed).
• Do not use if the ulcer is documented as superficial, involving only epidermis/dermis, or if bone/muscle is exposed.