ICD-10 Code L89.504 – Pressure ulcer of unspecified ankle, stage 4 (2026): Diagnosis, Symptoms & Billing Guide
2026 ICD-10-CM Diagnosis Code L89.504 – Pressure ulcer of unspecified ankle, stage 4
What it is
This code identifies a pressure ulcer on an ankle, with the side not specified, that is documented as stage 4. Stage 4 means full-thickness tissue loss with exposed deeper structures.
Clinical signs
Look for a deep open ulcer at the ankle with visible bone, tendon, or muscle, or clear documentation of stage 4 pressure injury. Clinical features vary; refer to documentation.
When to use this code
Use L89.504 when the provider documents a pressure ulcer of the ankle as stage 4 but does not specify right or left. This code fits inpatient, outpatient, or wound-care records when the diagnosis is clearly stated. If the side is documented, choose the more specific ankle code instead.
Do not use for
Do not use this code for pressure injuries at other sites or for ulcers caused by arterial, venous, diabetic, or traumatic disease. Check documentation if the stage or ankle location is unclear.
Coding tip
Confirm both the anatomic site and stage in the note before assigning L89.504.