Pressure ulcer of other site, stage 4

This code signifies a severe pressure injury, also known as a pressure ulcer or bed sore, that has progressed to stage 4. At this stage, there is full-thickness tissue loss with exposed bone, tendon, or muscle, and often includes undermining and tunneling. It indicates extensive tissue destruction and necrosis.

Use this code when documentation clearly identifies a pressure ulcer located at an anatomical site other than the back, hip, buttock, ankle, heel, or elbow, and explicitly states it is a stage 4. This code is appropriate for pressure ulcers on areas like the head, ear, or knee, provided the stage is confirmed as 4.

• Always verify the specific anatomical site of the pressure ulcer to ensure it falls under "other site" and not a more specific L89.xx code.
• Confirm the stage is explicitly documented as "stage 4" or described with characteristics consistent with a stage 4 pressure ulcer (e.g., exposed bone/muscle).
• Code any associated complications, such as infection (e.g., osteomyelitis if bone is involved), in addition to the pressure ulcer code.