Pressure-induced deep tissue damage of unspecified site

This code signifies a pressure injury where there is suspected deep tissue damage beneath intact skin, or a blood-filled blister due to pressure. It represents a serious pressure injury that has not yet broken the skin but indicates underlying tissue necrosis.

Use this code when documentation clearly states "deep tissue injury," "DTI," or "suspected deep tissue injury" due to pressure, and the specific anatomical site is not documented or is unknown. This code is appropriate when the injury presents as a persistent non-blanchable deep red, maroon, or purple discoloration.

• This code should only be used when the site of the deep tissue damage is truly unspecified. If a site is documented (e.g., heel, sacrum), a more specific code from the L89.xxx series should be used.
• Do not confuse this with unstageable pressure ulcers (L89.xxx0), which involve full-thickness tissue loss where the base of the ulcer is covered by slough or eschar.
• Always sequence this code after any associated external cause codes, if applicable, and ensure documentation supports the pressure-induced etiology.